30972423 has 4 divisors (see below), whose sum is σ = 41296568. Its totient is φ = 20648280.

The previous prime is 30972407. The next prime is 30972433. The reversal of 30972423 is 32427903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32427903 = 3 ⋅10809301.

It is not a de Polignac number, because 30972423 - 2⁴ = 30972407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30972433) 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, 5162068 + ... + 5162073.

It is an arithmetic number, because the mean of its divisors is an integer number (10324142).

Almost surely, 2^30972423 is an apocalyptic number.

30972423 is a deficient number, since it is larger than the sum of its proper divisors (10324145).

30972423 is a wasteful number, since it uses less digits than its factorization.

30972423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10324144.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 30972423 is about 5565.2873241190. The cubic root of 30972423 is about 314.0448872230.

The spelling of 30972423 in words is "thirty million, nine hundred seventy-two thousand, four hundred twenty-three".