164187979 has 2 divisors, whose sum is σ = 164187980. Its totient is φ = 164187978.

The previous prime is 164187977. The next prime is 164188021. The reversal of 164187979 is 979781461.

It is a weak prime.

It is an emirp because it is prime and its reverse (979781461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164187979 - 2¹ = 164187977 is a prime.

Together with 164187977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (164187977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82093989 + 82093990.

It is an arithmetic number, because the mean of its divisors is an integer number (82093990).

Almost surely, 2^164187979 is an apocalyptic number.

164187979 is a deficient number, since it is larger than the sum of its proper divisors (1).

164187979 is an equidigital number, since it uses as much as digits as its factorization.

164187979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 164187979 is about 12813.5857198522. The cubic root of 164187979 is about 547.5794220458.

The spelling of 164187979 in words is "one hundred sixty-four million, one hundred eighty-seven thousand, nine hundred seventy-nine".