92138981 has 16 divisors (see below), whose sum is σ = 103707648. Its totient is φ = 81135600.

The previous prime is 92138971. The next prime is 92138987. The reversal of 92138981 is 18983129.

It is a cyclic number.

It is not a de Polignac number, because 92138981 - 2²² = 87944677 is a prime.

It is a super-2 number, since 2×92138981² = 16979183639436722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (92138987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61220 + ... + 62706.

It is an arithmetic number, because the mean of its divisors is an integer number (6481728).

Almost surely, 2^92138981 is an apocalyptic number.

It is an amenable number.

92138981 is a deficient number, since it is larger than the sum of its proper divisors (11568667).

92138981 is a wasteful number, since it uses less digits than its factorization.

92138981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its digits is 31104, while the sum is 41.

The square root of 92138981 is about 9598.9051979900. The cubic root of 92138981 is about 451.6629516056.

The spelling of 92138981 in words is "ninety-two million, one hundred thirty-eight thousand, nine hundred eighty-one".