30939031 has 8 divisors (see below), whose sum is σ = 33221664. Its totient is φ = 28707840.

The previous prime is 30939001. The next prime is 30939043. The reversal of 30939031 is 13093903.

It is a happy number.

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 30939031 - 2⁷ = 30938903 is a prime.

It is a super-2 number, since 2×30939031² = 1914447278437922, 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 (30939001) 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, 11610 + ... + 14023.

It is an arithmetic number, because the mean of its divisors is an integer number (4152708).

Almost surely, 2^30939031 is an apocalyptic number.

30939031 is a deficient number, since it is larger than the sum of its proper divisors (2282633).

30939031 is a wasteful number, since it uses less digits than its factorization.

30939031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 30939031 is about 5562.2864902844. The cubic root of 30939031 is about 313.9319872438.

It can be divided in two parts, 309 and 39031, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 30939031 in words is "thirty million, nine hundred thirty-nine thousand, thirty-one".