30903121 has 4 divisors (see below), whose sum is σ = 30984192. Its totient is φ = 30822052.

The previous prime is 30903113. The next prime is 30903143. The reversal of 30903121 is 12130903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30903121 - 2³ = 30903113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30903181) 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, 39961 + ... + 40726.

It is an arithmetic number, because the mean of its divisors is an integer number (7746048).

Almost surely, 2^30903121 is an apocalyptic number.

It is an amenable number.

30903121 is a deficient number, since it is larger than the sum of its proper divisors (81071).

30903121 is an equidigital number, since it uses as much as digits as its factorization.

30903121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81070.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 30903121 is about 5559.0575640121. The cubic root of 30903121 is about 313.8104830937.

The spelling of 30903121 in words is "thirty million, nine hundred three thousand, one hundred twenty-one".