92242721 has 4 divisors (see below), whose sum is σ = 92365332. Its totient is φ = 92120112.

The previous prime is 92242699. The next prime is 92242723. The reversal of 92242721 is 12724229.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75342400 + 16900321 = 8680^2 + 4111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-92242721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (92242723) 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, 60170 + ... + 61683.

It is an arithmetic number, because the mean of its divisors is an integer number (23091333).

Almost surely, 2^92242721 is an apocalyptic number.

It is an amenable number.

92242721 is a deficient number, since it is larger than the sum of its proper divisors (122611).

92242721 is a wasteful number, since it uses less digits than its factorization.

92242721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122610.

The product of its digits is 4032, while the sum is 29.

The square root of 92242721 is about 9604.3074190698. The cubic root of 92242721 is about 451.8323983120.

The spelling of 92242721 in words is "ninety-two million, two hundred forty-two thousand, seven hundred twenty-one".