82107931997 has 16 divisors (see below), whose sum is σ = 101289350400. Its totient is φ = 64814452992.

The previous prime is 82107931993. The next prime is 82107931999. The reversal of 82107931997 is 79913970128.

It is a cyclic number.

It is not a de Polignac number, because 82107931997 - 2² = 82107931993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82107931991) 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 15 ways as a sum of consecutive naturals, for example, 1002497 + ... + 1081302.

It is an arithmetic number, because the mean of its divisors is an integer number (6330584400).

Almost surely, 2^82107931997 is an apocalyptic number.

It is an amenable number.

82107931997 is a deficient number, since it is larger than the sum of its proper divisors (19181418403).

82107931997 is a wasteful number, since it uses less digits than its factorization.

82107931997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084252.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 82107931997 in words is "eighty-two billion, one hundred seven million, nine hundred thirty-one thousand, nine hundred ninety-seven".