13047931 has 8 divisors (see below), whose sum is σ = 14505344. Its totient is φ = 11655360.

The previous prime is 13047929. The next prime is 13047943. The reversal of 13047931 is 13974031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13047931 - 2¹ = 13047929 is a prime.

It is a super-2 number, since 2×13047931² = 340497006761522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13047931.

It is not an unprimeable number, because it can be changed into a prime (13047971) 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 7 ways as a sum of consecutive naturals, for example, 15786 + ... + 16591.

It is an arithmetic number, because the mean of its divisors is an integer number (1813168).

Almost surely, 2^13047931 is an apocalyptic number.

13047931 is the 2086-th hex number.

13047931 is a deficient number, since it is larger than the sum of its proper divisors (1457413).

13047931 is a wasteful number, since it uses less digits than its factorization.

13047931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32421.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 13047931 is about 3612.1919937899. The cubic root of 13047931 is about 235.4220933757.

The spelling of 13047931 in words is "thirteen million, forty-seven thousand, nine hundred thirty-one".