164481979 has 2 divisors, whose sum is σ = 164481980. Its totient is φ = 164481978.

The previous prime is 164481973. The next prime is 164482007. The reversal of 164481979 is 979184461.

It is a weak prime.

It is an emirp because it is prime and its reverse (979184461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164481979 is a prime.

It is not a weakly prime, because it can be changed into another prime (164481973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82240989 + 82240990.

It is an arithmetic number, because the mean of its divisors is an integer number (82240990).

Almost surely, 2^164481979 is an apocalyptic number.

164481979 is a deficient number, since it is larger than the sum of its proper divisors (1).

164481979 is an equidigital number, since it uses as much as digits as its factorization.

164481979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 164481979 is about 12825.0527874157. The cubic root of 164481979 is about 547.9060646261.

The spelling of 164481979 in words is "one hundred sixty-four million, four hundred eighty-one thousand, nine hundred seventy-nine".