162595981 has 2 divisors, whose sum is σ = 162595982. Its totient is φ = 162595980.

The previous prime is 162595963. The next prime is 162595987. The reversal of 162595981 is 189595261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138438756 + 24157225 = 11766^2 + 4915^2 .

It is a cyclic number.

It is not a de Polignac number, because 162595981 - 2⁵ = 162595949 is a prime.

It is a super-2 number, since 2×162595981² = 52874906074704722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162595987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81297990 + 81297991.

It is an arithmetic number, because the mean of its divisors is an integer number (81297991).

Almost surely, 2^162595981 is an apocalyptic number.

It is an amenable number.

162595981 is a deficient number, since it is larger than the sum of its proper divisors (1).

162595981 is an equidigital number, since it uses as much as digits as its factorization.

162595981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 46.

The square root of 162595981 is about 12751.3129127945. The cubic root of 162595981 is about 545.8038593386.

The spelling of 162595981 in words is "one hundred sixty-two million, five hundred ninety-five thousand, nine hundred eighty-one".