92128981 has 4 divisors (see below), whose sum is σ = 105290272. Its totient is φ = 78967692.

The previous prime is 92128937. The next prime is 92129029. The reversal of 92128981 is 18982129.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 92128981 - 2¹¹ = 92126933 is a prime.

It is a super-2 number, since 2×92128981² = 16975498280196722, 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 (92128081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6580635 + ... + 6580648.

It is an arithmetic number, because the mean of its divisors is an integer number (26322568).

Almost surely, 2^92128981 is an apocalyptic number.

It is an amenable number.

92128981 is a deficient number, since it is larger than the sum of its proper divisors (13161291).

92128981 is a wasteful number, since it uses less digits than its factorization.

92128981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13161290.

The product of its digits is 20736, while the sum is 40.

The square root of 92128981 is about 9598.3842911190. The cubic root of 92128981 is about 451.6466110988.

The spelling of 92128981 in words is "ninety-two million, one hundred twenty-eight thousand, nine hundred eighty-one".