30979231 has 8 divisors (see below), whose sum is σ = 31894128. Its totient is φ = 30072000.

The previous prime is 30979213. The next prime is 30979241. The reversal of 30979231 is 13297903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30979231 - 2⁹ = 30978719 is a prime.

It is a super-2 number, since 2×30979231² = 1919425506702722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30979241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6861 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (3986766).

Almost surely, 2^30979231 is an apocalyptic number.

30979231 is a deficient number, since it is larger than the sum of its proper divisors (914897).

30979231 is a wasteful number, since it uses less digits than its factorization.

30979231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 30979231 is about 5565.8989390753. The cubic root of 30979231 is about 314.0678954429.

The spelling of 30979231 in words is "thirty million, nine hundred seventy-nine thousand, two hundred thirty-one".