30904133 has 4 divisors (see below), whose sum is σ = 33281388. Its totient is φ = 28526880.

The previous prime is 30904087. The next prime is 30904151. The reversal of 30904133 is 33140903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5026564 + 25877569 = 2242^2 + 5087^2 .

It is a cyclic number.

It is not a de Polignac number, because 30904133 - 2⁸ = 30903877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30904099 and 30904108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30904193) 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, 1188608 + ... + 1188633.

It is an arithmetic number, because the mean of its divisors is an integer number (8320347).

Almost surely, 2^30904133 is an apocalyptic number.

It is an amenable number.

30904133 is a deficient number, since it is larger than the sum of its proper divisors (2377255).

30904133 is a wasteful number, since it uses less digits than its factorization.

30904133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377254.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 30904133 is about 5559.1485858897. The cubic root of 30904133 is about 313.8139085594.

The spelling of 30904133 in words is "thirty million, nine hundred four thousand, one hundred thirty-three".