82105979 has 2 divisors, whose sum is σ = 82105980. Its totient is φ = 82105978.

The previous prime is 82105967. The next prime is 82105981. The reversal of 82105979 is 97950128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82105979 - 2¹² = 82101883 is a prime.

Together with 82105981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82105279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41052989 + 41052990.

It is an arithmetic number, because the mean of its divisors is an integer number (41052990).

Almost surely, 2^82105979 is an apocalyptic number.

82105979 is a deficient number, since it is larger than the sum of its proper divisors (1).

82105979 is an equidigital number, since it uses as much as digits as its factorization.

82105979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 82105979 is about 9061.2349599820. The cubic root of 82105979 is about 434.6352321504.

The spelling of 82105979 in words is "eighty-two million, one hundred five thousand, nine hundred seventy-nine".