7713139 has 6 divisors (see below), whose sum is σ = 8972484. Its totient is φ = 6611220.

The previous prime is 7713137. The next prime is 7713157. The reversal of 7713139 is 9313177.

It is not a de Polignac number, because 7713139 - 2¹ = 7713137 is a prime.

It is a Duffinian number.

7713139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7713139.

It is not an unprimeable number, because it can be changed into a prime (7713133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78657 + ... + 78754.

It is an arithmetic number, because the mean of its divisors is an integer number (1495414).

Almost surely, 2^7713139 is an apocalyptic number.

7713139 is a deficient number, since it is larger than the sum of its proper divisors (1259345).

7713139 is a wasteful number, since it uses less digits than its factorization.

7713139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157425 (or 157418 counting only the distinct ones).

The product of its digits is 3969, while the sum is 31.

The square root of 7713139 is about 2777.2538594806. The cubic root of 7713139 is about 197.5803358485.

The spelling of 7713139 in words is "seven million, seven hundred thirteen thousand, one hundred thirty-nine".