31738793139 has 16 divisors (see below), whose sum is σ = 47390679040. Its totient is φ = 20992585320.

The previous prime is 31738793129. The next prime is 31738793153. The reversal of 31738793139 is 93139783713.

It is a happy number.

31738793139 is a `hidden beast` number, since 317 + 3 + 8 + 7 + 9 + 313 + 9 = 666.

It is not a de Polignac number, because 31738793139 - 2⁴ = 31738793123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31738793129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4624567 + ... + 4631424.

It is an arithmetic number, because the mean of its divisors is an integer number (2961917440).

Almost surely, 2^31738793139 is an apocalyptic number.

31738793139 is a deficient number, since it is larger than the sum of its proper divisors (15651885901).

31738793139 is a wasteful number, since it uses less digits than its factorization.

31738793139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9256127 (or 9256121 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The spelling of 31738793139 in words is "thirty-one billion, seven hundred thirty-eight million, seven hundred ninety-three thousand, one hundred thirty-nine".