164686979 has 2 divisors, whose sum is σ = 164686980. Its totient is φ = 164686978.

The previous prime is 164686961. The next prime is 164686993. The reversal of 164686979 is 979686461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164686979 - 2⁸ = 164686723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164686079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82343489 + 82343490.

It is an arithmetic number, because the mean of its divisors is an integer number (82343490).

Almost surely, 2^164686979 is an apocalyptic number.

164686979 is a deficient number, since it is larger than the sum of its proper divisors (1).

164686979 is an equidigital number, since it uses as much as digits as its factorization.

164686979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 164686979 is about 12833.0424685653. The cubic root of 164686979 is about 548.1335953522.

The spelling of 164686979 in words is "one hundred sixty-four million, six hundred eighty-six thousand, nine hundred seventy-nine".