30972679 has 4 divisors (see below), whose sum is σ = 32602840. Its totient is φ = 29342520.

The previous prime is 30972673. The next prime is 30972707. The reversal of 30972679 is 97627903.

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

It is a cyclic number.

It is not a de Polignac number, because 30972679 - 2⁹ = 30972167 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 (30972673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815052 + ... + 815089.

It is an arithmetic number, because the mean of its divisors is an integer number (8150710).

Almost surely, 2^30972679 is an apocalyptic number.

30972679 is a deficient number, since it is larger than the sum of its proper divisors (1630161).

30972679 is a wasteful number, since it uses less digits than its factorization.

30972679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630160.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 30972679 is about 5565.3103237825. The cubic root of 30972679 is about 314.0457524579.

It can be divided in two parts, 3097 and 2679, that added together give a square (5776 = 76²).

The spelling of 30972679 in words is "thirty million, nine hundred seventy-two thousand, six hundred seventy-nine".