31999907073 has 8 divisors (see below), whose sum is σ = 42952896000. Its totient is φ = 21190094768.

The previous prime is 31999907057. The next prime is 31999907087. The reversal of 31999907073 is 37070999913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31999907073 - 2⁴ = 31999907057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31999907033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35793633 + ... + 35794526.

It is an arithmetic number, because the mean of its divisors is an integer number (5369112000).

Almost surely, 2^31999907073 is an apocalyptic number.

It is an amenable number.

31999907073 is a deficient number, since it is larger than the sum of its proper divisors (10952988927).

31999907073 is a wasteful number, since it uses less digits than its factorization.

31999907073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71588311.

The product of its (nonzero) digits is 2893401, while the sum is 57.

The spelling of 31999907073 in words is "thirty-one billion, nine hundred ninety-nine million, nine hundred seven thousand, seventy-three".