30993385 has 4 divisors (see below), whose sum is σ = 37192068. Its totient is φ = 24794704.

The previous prime is 30993353. The next prime is 30993401. The reversal of 30993385 is 58339903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58339903 = 17 ⋅3431759.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 25290841 = 2388^2 + 5029^2 .

It is a cyclic number.

It is not a de Polignac number, because 30993385 - 2⁵ = 30993353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099334 + ... + 3099343.

It is an arithmetic number, because the mean of its divisors is an integer number (9298017).

Almost surely, 2^30993385 is an apocalyptic number.

It is an amenable number.

30993385 is a deficient number, since it is larger than the sum of its proper divisors (6198683).

30993385 is an equidigital number, since it uses as much as digits as its factorization.

30993385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6198682.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 30993385 is about 5567.1702865998. The cubic root of 30993385 is about 314.1157193130.

The spelling of 30993385 in words is "thirty million, nine hundred ninety-three thousand, three hundred eighty-five".