92155981 has 2 divisors, whose sum is σ = 92155982. Its totient is φ = 92155980.

The previous prime is 92155919. The next prime is 92155993. The reversal of 92155981 is 18955129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77264100 + 14891881 = 8790^2 + 3859^2 .

It is a cyclic number.

It is not a de Polignac number, because 92155981 - 2⁷ = 92155853 is a prime.

It is a super-2 number, since 2×92155981² = 16985449668144722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (92155081) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46077990 + 46077991.

It is an arithmetic number, because the mean of its divisors is an integer number (46077991).

Almost surely, 2^92155981 is an apocalyptic number.

It is an amenable number.

92155981 is a deficient number, since it is larger than the sum of its proper divisors (1).

92155981 is an equidigital number, since it uses as much as digits as its factorization.

92155981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 40.

The square root of 92155981 is about 9599.7906748012. The cubic root of 92155981 is about 451.6907277539.

The spelling of 92155981 in words is "ninety-two million, one hundred fifty-five thousand, nine hundred eighty-one".