30005997 has 32 divisors (see below), whose sum is σ = 48537600. Its totient is φ = 16106688.

The previous prime is 30005977. The next prime is 30006013. The reversal of 30005997 is 79950003.

It is not a de Polignac number, because 30005997 - 2⁸ = 30005741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30005917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62404 + ... + 62882.

It is an arithmetic number, because the mean of its divisors is an integer number (1516800).

Almost surely, 2^30005997 is an apocalyptic number.

It is an amenable number.

30005997 is a deficient number, since it is larger than the sum of its proper divisors (18531603).

30005997 is a wasteful number, since it uses less digits than its factorization.

30005997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 30005997 is about 5477.7729963919. The cubic root of 30005997 is about 310.7439537419.

The spelling of 30005997 in words is "thirty million, five thousand, nine hundred ninety-seven".