30939079 has 4 divisors (see below), whose sum is σ = 31362976. Its totient is φ = 30515184.

The previous prime is 30939053. The next prime is 30939101. The reversal of 30939079 is 97093903.

It is a happy number.

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 30939079 - 2¹⁵ = 30906311 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 (30939479) 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, 211839 + ... + 211984.

It is an arithmetic number, because the mean of its divisors is an integer number (7840744).

Almost surely, 2^30939079 is an apocalyptic number.

30939079 is a deficient number, since it is larger than the sum of its proper divisors (423897).

30939079 is an equidigital number, since it uses as much as digits as its factorization.

30939079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423896.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 30939079 is about 5562.2908050551. The cubic root of 30939079 is about 313.9321495924.

The spelling of 30939079 in words is "thirty million, nine hundred thirty-nine thousand, seventy-nine".