30744921 has 4 divisors (see below), whose sum is σ = 40993232. Its totient is φ = 20496612.

The previous prime is 30744919. The next prime is 30744941. The reversal of 30744921 is 12944703.

It is a happy number.

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 not a de Polignac number, because 30744921 - 2¹ = 30744919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30744911) 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, 5124151 + ... + 5124156.

It is an arithmetic number, because the mean of its divisors is an integer number (10248308).

Almost surely, 2^30744921 is an apocalyptic number.

It is an amenable number.

30744921 is a deficient number, since it is larger than the sum of its proper divisors (10248311).

30744921 is a wasteful number, since it uses less digits than its factorization.

30744921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10248310.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30744921 is about 5544.8102762854. The cubic root of 30744921 is about 313.2740780005.

The spelling of 30744921 in words is "thirty million, seven hundred forty-four thousand, nine hundred twenty-one".