161704579 has 2 divisors, whose sum is σ = 161704580. Its totient is φ = 161704578.

The previous prime is 161704549. The next prime is 161704583. The reversal of 161704579 is 975407161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161704579 - 2¹⁷ = 161573507 is a prime.

It is a super-2 number, since 2×161704579² = 52296741739134482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161704549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80852289 + 80852290.

It is an arithmetic number, because the mean of its divisors is an integer number (80852290).

Almost surely, 2^161704579 is an apocalyptic number.

161704579 is a deficient number, since it is larger than the sum of its proper divisors (1).

161704579 is an equidigital number, since it uses as much as digits as its factorization.

161704579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 161704579 is about 12716.3115328306. The cubic root of 161704579 is about 544.8046085759.

The spelling of 161704579 in words is "one hundred sixty-one million, seven hundred four thousand, five hundred seventy-nine".