30992923 has 4 divisors (see below), whose sum is σ = 33377008. Its totient is φ = 28608840.

The previous prime is 30992917. The next prime is 30992959. The reversal of 30992923 is 32929903.

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

It is not a de Polignac number, because 30992923 - 2²¹ = 28895771 is a prime.

It is a super-2 number, since 2×30992923² = 1921122552167858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30992903) 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, 1192023 + ... + 1192048.

It is an arithmetic number, because the mean of its divisors is an integer number (8344252).

Almost surely, 2^30992923 is an apocalyptic number.

30992923 is a deficient number, since it is larger than the sum of its proper divisors (2384085).

30992923 is a wasteful number, since it uses less digits than its factorization.

30992923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384084.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 30992923 is about 5567.1287931931. The cubic root of 30992923 is about 314.1141585264.

The spelling of 30992923 in words is "thirty million, nine hundred ninety-two thousand, nine hundred twenty-three".