164115961 has 2 divisors, whose sum is σ = 164115962. Its totient is φ = 164115960.

The previous prime is 164115947. The next prime is 164115997. The reversal of 164115961 is 169511461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 38675961 = 11200^2 + 6219^2 .

It is a cyclic number.

It is not a de Polignac number, because 164115961 - 2⁵ = 164115929 is a prime.

It is not a weakly prime, because it can be changed into another prime (164112961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82057980 + 82057981.

It is an arithmetic number, because the mean of its divisors is an integer number (82057981).

Almost surely, 2^164115961 is an apocalyptic number.

It is an amenable number.

164115961 is a deficient number, since it is larger than the sum of its proper divisors (1).

164115961 is an equidigital number, since it uses as much as digits as its factorization.

164115961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 164115961 is about 12810.7751912209. The cubic root of 164115961 is about 547.4993484977.

The spelling of 164115961 in words is "one hundred sixty-four million, one hundred fifteen thousand, nine hundred sixty-one".