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12989413 = 60121613
BaseRepresentation
bin110001100011…
…001111100101
3220102221010101
4301203033211
511311130123
61142224101
7215260003
oct61431745
926387111
1012989413
117372158
124425031
1328ca458
141a21a73
151218aad
hexc633e5

12989413 has 4 divisors (see below), whose sum is σ = 13011628. Its totient is φ = 12967200.

The previous prime is 12989387. The next prime is 12989429. The reversal of 12989413 is 31498921.

12989413 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12376324 + 613089 = 3518^2 + 783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12989413 is a prime.

It is a super-3 number, since 3×129894133 (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10206 + ... + 11407.

It is an arithmetic number, because the mean of its divisors is an integer number (3252907).

Almost surely, 212989413 is an apocalyptic number.

It is an amenable number.

12989413 is a deficient number, since it is larger than the sum of its proper divisors (22215).

12989413 is an equidigital number, since it uses as much as digits as its factorization.

12989413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22214.

The product of its digits is 15552, while the sum is 37.

The square root of 12989413 is about 3604.0828236876. The cubic root of 12989413 is about 235.0696217437.

The spelling of 12989413 in words is "twelve million, nine hundred eighty-nine thousand, four hundred thirteen".

Divisors: 1 601 21613 12989413