7993391908 has 12 divisors (see below), whose sum is σ = 14811285132. Its totient is φ = 3761596160.

The previous prime is 7993391869. The next prime is 7993391927. The reversal of 7993391908 is 8091933997.

It can be written as a sum of positive squares in 2 ways, for example, as 7255291684 + 738100224 = 85178^2 + 27168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58774873 + ... + 58775008.

It is an arithmetic number, because the mean of its divisors is an integer number (1234273761).

Almost surely, 2^7993391908 is an apocalyptic number.

It is an amenable number.

7993391908 is a deficient number, since it is larger than the sum of its proper divisors (6817893224).

7993391908 is a wasteful number, since it uses less digits than its factorization.

7993391908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117549902 (or 117549900 counting only the distinct ones).

The product of its (nonzero) digits is 3306744, while the sum is 58.

The square root of 7993391908 is about 89405.7711112655. The cubic root of 7993391908 is about 1999.4491739759.

The spelling of 7993391908 in words is "seven billion, nine hundred ninety-three million, three hundred ninety-one thousand, nine hundred eight".