164728073 has 2 divisors, whose sum is σ = 164728074. Its totient is φ = 164728072.

The previous prime is 164728027. The next prime is 164728097. The reversal of 164728073 is 370827461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116467264 + 48260809 = 10792^2 + 6947^2 .

It is a cyclic number.

It is not a de Polignac number, because 164728073 - 2²⁰ = 163679497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (164728013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82364036 + 82364037.

It is an arithmetic number, because the mean of its divisors is an integer number (82364037).

Almost surely, 2^164728073 is an apocalyptic number.

It is an amenable number.

164728073 is a deficient number, since it is larger than the sum of its proper divisors (1).

164728073 is an equidigital number, since it uses as much as digits as its factorization.

164728073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 164728073 is about 12834.6434699216. The cubic root of 164728073 is about 548.1791831067.

The spelling of 164728073 in words is "one hundred sixty-four million, seven hundred twenty-eight thousand, seventy-three".