82015897 has 2 divisors, whose sum is σ = 82015898. Its totient is φ = 82015896.

The previous prime is 82015891. The next prime is 82015919. The reversal of 82015897 is 79851028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82011136 + 4761 = 9056^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 82015897 - 2³ = 82015889 is a prime.

It is not a weakly prime, because it can be changed into another prime (82015891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41007948 + 41007949.

It is an arithmetic number, because the mean of its divisors is an integer number (41007949).

Almost surely, 2^82015897 is an apocalyptic number.

It is an amenable number.

82015897 is a deficient number, since it is larger than the sum of its proper divisors (1).

82015897 is an equidigital number, since it uses as much as digits as its factorization.

82015897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 82015897 is about 9056.2628605844. The cubic root of 82015897 is about 434.4762216499.

The spelling of 82015897 in words is "eighty-two million, fifteen thousand, eight hundred ninety-seven".