30993075 has 72 divisors (see below), whose sum is σ = 59540832. Its totient is φ = 15375360.

The previous prime is 30993073. The next prime is 30993077. The reversal of 30993075 is 57039903.

It is an interprime number because it is at equal distance from previous prime (30993073) and next prime (30993077).

It is not a de Polignac number, because 30993075 - 2¹ = 30993073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30993071) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 274219 + ... + 274331.

It is an arithmetic number, because the mean of its divisors is an integer number (826956).

Almost surely, 2^30993075 is an apocalyptic number.

30993075 is a deficient number, since it is larger than the sum of its proper divisors (28547757).

30993075 is a wasteful number, since it uses less digits than its factorization.

30993075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 30993075 is about 5567.1424447377. The cubic root of 30993075 is about 314.1146720337.

The spelling of 30993075 in words is "thirty million, nine hundred ninety-three thousand, seventy-five".