7138931 has 2 divisors, whose sum is σ = 7138932. Its totient is φ = 7138930.

The previous prime is 7138919. The next prime is 7138949. The reversal of 7138931 is 1398317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7138931 - 2⁶ = 7138867 is a prime.

It is a super-2 number, since 2×7138931² = 101928671645522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7138981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569465 + 3569466.

It is an arithmetic number, because the mean of its divisors is an integer number (3569466).

Almost surely, 2^7138931 is an apocalyptic number.

7138931 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138931 is an equidigital number, since it uses as much as digits as its factorization.

7138931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 7138931 is about 2671.8778040921. The cubic root of 7138931 is about 192.5503865404.

The spelling of 7138931 in words is "seven million, one hundred thirty-eight thousand, nine hundred thirty-one".