92122721 has 4 divisors (see below), whose sum is σ = 92455572. Its totient is φ = 91789872.

The previous prime is 92122703. The next prime is 92122739. The reversal of 92122721 is 12722129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12722129 = 7 ⋅1817447.

It is an interprime number because it is at equal distance from previous prime (92122703) and next prime (92122739).

It can be written as a sum of positive squares in 2 ways, for example, as 33814225 + 58308496 = 5815^2 + 7636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-92122721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (92122741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166010 + ... + 166563.

It is an arithmetic number, because the mean of its divisors is an integer number (23113893).

Almost surely, 2^92122721 is an apocalyptic number.

It is an amenable number.

92122721 is a deficient number, since it is larger than the sum of its proper divisors (332851).

92122721 is a wasteful number, since it uses less digits than its factorization.

92122721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332850.

The product of its digits is 1008, while the sum is 26.

The square root of 92122721 is about 9598.0581890297. The cubic root of 92122721 is about 451.6363813398.

The spelling of 92122721 in words is "ninety-two million, one hundred twenty-two thousand, seven hundred twenty-one".