13000931 has 4 divisors (see below), whose sum is σ = 13017552. Its totient is φ = 12984312.

The previous prime is 13000919. The next prime is 13000943. The reversal of 13000931 is 13900031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13900031 = 173 ⋅80347.

It is an interprime number because it is at equal distance from previous prime (13000919) and next prime (13000943).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13000931 is a prime.

It is a super-2 number, since 2×13000931² = 338048413733522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13000331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7076 + ... + 8721.

It is an arithmetic number, because the mean of its divisors is an integer number (3254388).

Almost surely, 2^13000931 is an apocalyptic number.

13000931 is a deficient number, since it is larger than the sum of its proper divisors (16621).

13000931 is an equidigital number, since it uses as much as digits as its factorization.

13000931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16620.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 13000931 is about 3605.6803796232. The cubic root of 13000931 is about 235.1390816960.

Adding to 13000931 its reverse (13900031), we get a palindrome (26900962).

It can be divided in two parts, 13000 and 931, that added together give a palindrome (13931).

The spelling of 13000931 in words is "thirteen million, nine hundred thirty-one", and thus it is an aban number.