82591679 has 2 divisors, whose sum is σ = 82591680. Its totient is φ = 82591678.

The previous prime is 82591633. The next prime is 82591693. The reversal of 82591679 is 97619528.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82591679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82591609) 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 as a sum of consecutive naturals, namely, 41295839 + 41295840.

It is an arithmetic number, because the mean of its divisors is an integer number (41295840).

Almost surely, 2^82591679 is an apocalyptic number.

82591679 is a deficient number, since it is larger than the sum of its proper divisors (1).

82591679 is an equidigital number, since it uses as much as digits as its factorization.

82591679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 82591679 is about 9087.9964238549. The cubic root of 82591679 is about 435.4905796621.

The spelling of 82591679 in words is "eighty-two million, five hundred ninety-one thousand, six hundred seventy-nine".