82507997 has 12 divisors (see below), whose sum is σ = 97467264. Its totient is φ = 69235920.

The previous prime is 82507981. The next prime is 82508009. The reversal of 82507997 is 79970528.

It is not a de Polignac number, because 82507997 - 2⁴ = 82507981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82507907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20333 + ... + 24050.

It is an arithmetic number, because the mean of its divisors is an integer number (8122272).

Almost surely, 2^82507997 is an apocalyptic number.

It is an amenable number.

82507997 is a deficient number, since it is larger than the sum of its proper divisors (14959267).

82507997 is a wasteful number, since it uses less digits than its factorization.

82507997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44420 (or 44407 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 82507997 is about 9083.3912719865. The cubic root of 82507997 is about 435.3434500803.

The spelling of 82507997 in words is "eighty-two million, five hundred seven thousand, nine hundred ninety-seven".