92137981 has 8 divisors (see below), whose sum is σ = 99389304. Its totient is φ = 84910080.

The previous prime is 92137961. The next prime is 92137993. The reversal of 92137981 is 18973129.

It can be written as a sum of positive squares in 4 ways, for example, as 6205081 + 85932900 = 2491^2 + 9270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 92137981 - 2⁹ = 92137469 is a prime.

It is a super-2 number, since 2×92137981² = 16978815085512722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (92137961) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2805 + ... + 13861.

It is an arithmetic number, because the mean of its divisors is an integer number (12423663).

Almost surely, 2^92137981 is an apocalyptic number.

It is an amenable number.

92137981 is a deficient number, since it is larger than the sum of its proper divisors (7251323).

92137981 is a wasteful number, since it uses less digits than its factorization.

92137981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711.

The product of its digits is 27216, while the sum is 40.

The square root of 92137981 is about 9598.8531085750. The cubic root of 92137981 is about 451.6613176081.

The spelling of 92137981 in words is "ninety-two million, one hundred thirty-seven thousand, nine hundred eighty-one".