164819257 has 2 divisors, whose sum is σ = 164819258. Its totient is φ = 164819256.

The previous prime is 164819231. The next prime is 164819279. The reversal of 164819257 is 752918461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 66194496 = 9931^2 + 8136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164819257 is a prime.

It is not a weakly prime, because it can be changed into another prime (164819287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82409628 + 82409629.

It is an arithmetic number, because the mean of its divisors is an integer number (82409629).

Almost surely, 2^164819257 is an apocalyptic number.

It is an amenable number.

164819257 is a deficient number, since it is larger than the sum of its proper divisors (1).

164819257 is an equidigital number, since it uses as much as digits as its factorization.

164819257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 164819257 is about 12838.1952392071. The cubic root of 164819257 is about 548.2803112864.

The spelling of 164819257 in words is "one hundred sixty-four million, eight hundred nineteen thousand, two hundred fifty-seven".