30753993 has 8 divisors (see below), whose sum is σ = 42113728. Its totient is φ = 19948464.

The previous prime is 30753979. The next prime is 30753997. The reversal of 30753993 is 39935703.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30753993 - 2¹² = 30749897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30753997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138421 + ... + 138642.

It is an arithmetic number, because the mean of its divisors is an integer number (5264216).

Almost surely, 2^30753993 is an apocalyptic number.

It is an amenable number.

30753993 is a deficient number, since it is larger than the sum of its proper divisors (11359735).

30753993 is a wasteful number, since it uses less digits than its factorization.

30753993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277103.

The product of its (nonzero) digits is 76545, while the sum is 39.

The square root of 30753993 is about 5545.6282782026. The cubic root of 30753993 is about 313.3048878910.

The spelling of 30753993 in words is "thirty million, seven hundred fifty-three thousand, nine hundred ninety-three".