30750993 has 24 divisors (see below), whose sum is σ = 54669888. Its totient is φ = 16219872.

The previous prime is 30750989. The next prime is 30751001. The reversal of 30750993 is 39905703.

It is not a de Polignac number, because 30750993 - 2² = 30750989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30750193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17955 + ... + 19592.

It is an arithmetic number, because the mean of its divisors is an integer number (2277912).

Almost surely, 2^30750993 is an apocalyptic number.

It is an amenable number.

30750993 is a deficient number, since it is larger than the sum of its proper divisors (23918895).

30750993 is a wasteful number, since it uses less digits than its factorization.

30750993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37573 (or 37570 counting only the distinct ones).

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

The square root of 30750993 is about 5545.3577882766. The cubic root of 30750993 is about 313.2947001058.

The spelling of 30750993 in words is "thirty million, seven hundred fifty thousand, nine hundred ninety-three".