13288931 has 4 divisors (see below), whose sum is σ = 13747200. Its totient is φ = 12830664.

The previous prime is 13288927. The next prime is 13288937. The reversal of 13288931 is 13988231.

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

It is a cyclic number.

It is not a de Polignac number, because 13288931 - 2² = 13288927 is a prime.

It is a super-2 number, since 2×13288931² = 353191374245522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13288891 and 13288900.

It is not an unprimeable number, because it can be changed into a prime (13288937) 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, 229091 + ... + 229148.

It is an arithmetic number, because the mean of its divisors is an integer number (3436800).

Almost surely, 2^13288931 is an apocalyptic number.

13288931 is a deficient number, since it is larger than the sum of its proper divisors (458269).

13288931 is an equidigital number, since it uses as much as digits as its factorization.

13288931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458268.

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

The square root of 13288931 is about 3645.3986064627. The cubic root of 13288931 is about 236.8627036267.

The spelling of 13288931 in words is "thirteen million, two hundred eighty-eight thousand, nine hundred thirty-one".