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13080689 = 18172269
BaseRepresentation
bin110001111001…
…100001110001
3220121120022222
4301321201301
511322040224
61144210425
7216120056
oct61714161
926546288
1013080689
117424796
124469a15
13292cb6b
141a4702d
151235b5e
hexc79871

13080689 has 4 divisors (see below), whose sum is σ = 13153140. Its totient is φ = 13008240.

The previous prime is 13080673. The next prime is 13080707. The reversal of 13080689 is 98608031.

13080689 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 98608031 = 347284173.

It can be written as a sum of positive squares in 2 ways, for example, as 1575025 + 11505664 = 1255^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 13080689 - 24 = 13080673 is a prime.

It is a super-2 number, since 2×130806892 = 342208849429442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13080649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35954 + ... + 36315.

It is an arithmetic number, because the mean of its divisors is an integer number (3288285).

Almost surely, 213080689 is an apocalyptic number.

It is an amenable number.

13080689 is a deficient number, since it is larger than the sum of its proper divisors (72451).

13080689 is an equidigital number, since it uses as much as digits as its factorization.

13080689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72450.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 13080689 is about 3616.7235172183. The cubic root of 13080689 is about 235.6189448169.

The spelling of 13080689 in words is "thirteen million, eighty thousand, six hundred eighty-nine".

Divisors: 1 181 72269 13080689