82176979 has 2 divisors, whose sum is σ = 82176980. Its totient is φ = 82176978.

The previous prime is 82176967. The next prime is 82176989. The reversal of 82176979 is 97967128.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82176979 - 2⁹ = 82176467 is a prime.

It is not a weakly prime, because it can be changed into another prime (82176949) 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 as a sum of consecutive naturals, namely, 41088489 + 41088490.

It is an arithmetic number, because the mean of its divisors is an integer number (41088490).

Almost surely, 2^82176979 is an apocalyptic number.

82176979 is a deficient number, since it is larger than the sum of its proper divisors (1).

82176979 is an equidigital number, since it uses as much as digits as its factorization.

82176979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 82176979 is about 9065.1519016506. The cubic root of 82176979 is about 434.7604776406.

The spelling of 82176979 in words is "eighty-two million, one hundred seventy-six thousand, nine hundred seventy-nine".