30968431 has 4 divisors (see below), whose sum is σ = 33350632. Its totient is φ = 28586232.

The previous prime is 30968393. The next prime is 30968437. The reversal of 30968431 is 13486903.

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 30968431 - 2⁷ = 30968303 is a prime.

It is a super-2 number, since 2×30968431² = 1918087437203522, 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 (30968437) 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, 1191081 + ... + 1191106.

It is an arithmetic number, because the mean of its divisors is an integer number (8337658).

Almost surely, 2^30968431 is an apocalyptic number.

30968431 is a deficient number, since it is larger than the sum of its proper divisors (2382201).

30968431 is a wasteful number, since it uses less digits than its factorization.

30968431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382200.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 30968431 is about 5564.9286608186. The cubic root of 30968431 is about 314.0313943484.

The spelling of 30968431 in words is "thirty million, nine hundred sixty-eight thousand, four hundred thirty-one".