162713981 has 2 divisors, whose sum is σ = 162713982. Its totient is φ = 162713980.

The previous prime is 162713977. The next prime is 162714053. The reversal of 162713981 is 189317261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113081956 + 49632025 = 10634^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 162713981 - 2² = 162713977 is a prime.

It is a super-2 number, since 2×162713981² = 52951679225736722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162713951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81356990 + 81356991.

It is an arithmetic number, because the mean of its divisors is an integer number (81356991).

Almost surely, 2^162713981 is an apocalyptic number.

It is an amenable number.

162713981 is a deficient number, since it is larger than the sum of its proper divisors (1).

162713981 is an equidigital number, since it uses as much as digits as its factorization.

162713981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 162713981 is about 12755.9390481454. The cubic root of 162713981 is about 545.9358619486.

The spelling of 162713981 in words is "one hundred sixty-two million, seven hundred thirteen thousand, nine hundred eighty-one".