7913131 has 4 divisors (see below), whose sum is σ = 7970200. Its totient is φ = 7856064.

The previous prime is 7913117. The next prime is 7913159. The reversal of 7913131 is 1313197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313197 = 73 ⋅17989.

It is a cyclic number.

It is not a de Polignac number, because 7913131 - 2⁵ = 7913099 is a prime.

It is a super-2 number, since 2×7913131² = 125235284446322, 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 = 7913096 and 7913105.

It is not an unprimeable number, because it can be changed into a prime (7913231) 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, 28326 + ... + 28603.

It is an arithmetic number, because the mean of its divisors is an integer number (1992550).

Almost surely, 2^7913131 is an apocalyptic number.

7913131 is a deficient number, since it is larger than the sum of its proper divisors (57069).

7913131 is a wasteful number, since it uses less digits than its factorization.

7913131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57068.

The product of its digits is 567, while the sum is 25.

The square root of 7913131 is about 2813.0287947335. The cubic root of 7913131 is about 199.2734555283.

The spelling of 7913131 in words is "seven million, nine hundred thirteen thousand, one hundred thirty-one".