7913239 has 2 divisors, whose sum is σ = 7913240. Its totient is φ = 7913238.

The previous prime is 7913237. The next prime is 7913251. The reversal of 7913239 is 9323197.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7913239 - 2¹ = 7913237 is a prime.

It is a super-2 number, since 2×7913239² = 125238702942242, which contains 22 as substring.

Together with 7913237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7913231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3956619 + 3956620.

It is an arithmetic number, because the mean of its divisors is an integer number (3956620).

Almost surely, 2^7913239 is an apocalyptic number.

7913239 is a deficient number, since it is larger than the sum of its proper divisors (1).

7913239 is an equidigital number, since it uses as much as digits as its factorization.

7913239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 34.

The square root of 7913239 is about 2813.0479910588. The cubic root of 7913239 is about 199.2743620989.

The spelling of 7913239 in words is "seven million, nine hundred thirteen thousand, two hundred thirty-nine".