92040721 has 4 divisors (see below), whose sum is σ = 92605552. Its totient is φ = 91475892.

The previous prime is 92040679. The next prime is 92040743. The reversal of 92040721 is 12704029.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12704029 = 13 ⋅977233.

It is a cyclic number.

It is not a de Polignac number, because 92040721 - 2¹¹ = 92038673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (92040821) 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, 282171 + ... + 282496.

It is an arithmetic number, because the mean of its divisors is an integer number (23151388).

Almost surely, 2^92040721 is an apocalyptic number.

It is an amenable number.

92040721 is a deficient number, since it is larger than the sum of its proper divisors (564831).

92040721 is a wasteful number, since it uses less digits than its factorization.

92040721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564830.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 92040721 is about 9593.7855406508. The cubic root of 92040721 is about 451.5023384871.

The spelling of 92040721 in words is "ninety-two million, forty thousand, seven hundred twenty-one".