7979271939 has 48 divisors (see below), whose sum is σ = 12545095680. Its totient is φ = 4868605440.

The previous prime is 7979271917. The next prime is 7979271947. The reversal of 7979271939 is 9391729797.

It is a de Polignac number, because none of the positive numbers 2^k-7979271939 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7979271959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4701139 + ... + 4702835.

It is an arithmetic number, because the mean of its divisors is an integer number (261356160).

Almost surely, 2^7979271939 is an apocalyptic number.

7979271939 is a deficient number, since it is larger than the sum of its proper divisors (4565823741).

7979271939 is a wasteful number, since it uses less digits than its factorization.

7979271939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2637 counting only the distinct ones).

The product of its digits is 13502538, while the sum is 63.

The square root of 7979271939 is about 89326.7705617974. The cubic root of 7979271939 is about 1998.2711675832.

The spelling of 7979271939 in words is "seven billion, nine hundred seventy-nine million, two hundred seventy-one thousand, nine hundred thirty-nine".