30939243 has 16 divisors (see below), whose sum is σ = 41932800. Its totient is φ = 20289024.

The previous prime is 30939241. The next prime is 30939247. The reversal of 30939243 is 34293903.

It is not a de Polignac number, because 30939243 - 2¹ = 30939241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30939241) 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, 68683 + ... + 69131.

It is an arithmetic number, because the mean of its divisors is an integer number (2620800).

Almost surely, 2^30939243 is an apocalyptic number.

30939243 is a deficient number, since it is larger than the sum of its proper divisors (10993557).

30939243 is a wasteful number, since it uses less digits than its factorization.

30939243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 30939243 is about 5562.3055471630. The cubic root of 30939243 is about 313.9327042823.

The spelling of 30939243 in words is "thirty million, nine hundred thirty-nine thousand, two hundred forty-three".