7972139502 has 16 divisors (see below), whose sum is σ = 17715865680. Its totient is φ = 2657379816.

The previous prime is 7972139449. The next prime is 7972139533. The reversal of 7972139502 is 2059312797.

7972139502 is a `hidden beast` number, since 7 + 9 + 7 + 2 + 139 + 502 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73816053 + ... + 73816160.

It is an arithmetic number, because the mean of its divisors is an integer number (1107241605).

Almost surely, 2^7972139502 is an apocalyptic number.

7972139502 is an abundant number, since it is smaller than the sum of its proper divisors (9743726178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7972139502 is a wasteful number, since it uses less digits than its factorization.

7972139502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147632224 (or 147632218 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 7972139502 is about 89286.8383469815. The cubic root of 7972139502 is about 1997.6755914423.

The spelling of 7972139502 in words is "seven billion, nine hundred seventy-two million, one hundred thirty-nine thousand, five hundred two".