30904843 has 4 divisors (see below), whose sum is σ = 31127320. Its totient is φ = 30682368.

The previous prime is 30904829. The next prime is 30904859. The reversal of 30904843 is 34840903.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30904843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30904543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111030 + ... + 111307.

It is an arithmetic number, because the mean of its divisors is an integer number (7781830).

Almost surely, 2^30904843 is an apocalyptic number.

30904843 is a deficient number, since it is larger than the sum of its proper divisors (222477).

30904843 is a wasteful number, since it uses less digits than its factorization.

30904843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222476.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 30904843 is about 5559.2124442227. The cubic root of 30904843 is about 313.8163117565.

The spelling of 30904843 in words is "thirty million, nine hundred four thousand, eight hundred forty-three".