164557873 has 2 divisors, whose sum is σ = 164557874. Its totient is φ = 164557872.

The previous prime is 164557853. The next prime is 164557891. The reversal of 164557873 is 378755461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164557584 + 289 = 12828^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 164557873 - 2⁹ = 164557361 is a prime.

It is not a weakly prime, because it can be changed into another prime (164557853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82278936 + 82278937.

It is an arithmetic number, because the mean of its divisors is an integer number (82278937).

Almost surely, 2^164557873 is an apocalyptic number.

It is an amenable number.

164557873 is a deficient number, since it is larger than the sum of its proper divisors (1).

164557873 is an equidigital number, since it uses as much as digits as its factorization.

164557873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 46.

The square root of 164557873 is about 12828.0112644166. The cubic root of 164557873 is about 547.9903218583.

The spelling of 164557873 in words is "one hundred sixty-four million, five hundred fifty-seven thousand, eight hundred seventy-three".