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12943769 = 19681251
BaseRepresentation
bin110001011000…
…000110011001
3220100121111212
4301120012121
511303200034
61141232505
7215006636
oct61300631
926317455
1012943769
117340933
124402735
1328b2747
141a0d18d
15120a2ce
hexc58199

12943769 has 4 divisors (see below), whose sum is σ = 13625040. Its totient is φ = 12262500.

The previous prime is 12943751. The next prime is 12943781. The reversal of 12943769 is 96734921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12943769 is a prime.

It is a super-2 number, since 2×129437692 = 335082311850722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12943729) 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, 340607 + ... + 340644.

It is an arithmetic number, because the mean of its divisors is an integer number (3406260).

Almost surely, 212943769 is an apocalyptic number.

12943769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12943769 is a deficient number, since it is larger than the sum of its proper divisors (681271).

12943769 is an equidigital number, since it uses as much as digits as its factorization.

12943769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681270.

The product of its digits is 81648, while the sum is 41.

The square root of 12943769 is about 3597.7449881836. The cubic root of 12943769 is about 234.7939585292.

The spelling of 12943769 in words is "twelve million, nine hundred forty-three thousand, seven hundred sixty-nine".

Divisors: 1 19 681251 12943769