30904013 has 16 divisors (see below), whose sum is σ = 37345920. Its totient is φ = 24981696.

The previous prime is 30904001. The next prime is 30904033. The reversal of 30904013 is 31040903.

It is a cyclic number.

It is not a de Polignac number, because 30904013 - 2⁶ = 30903949 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 (30904033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41795 + ... + 42527.

It is an arithmetic number, because the mean of its divisors is an integer number (2334120).

Almost surely, 2^30904013 is an apocalyptic number.

It is an amenable number.

30904013 is a deficient number, since it is larger than the sum of its proper divisors (6441907).

30904013 is a wasteful number, since it uses less digits than its factorization.

30904013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 30904013 is about 5559.1377928596. The cubic root of 30904013 is about 313.8135023816.

Adding to 30904013 its reverse (31040903), we get a palindrome (61944916).

The spelling of 30904013 in words is "thirty million, nine hundred four thousand, thirteen".