30065997 has 16 divisors (see below), whose sum is σ = 44227008. Its totient is φ = 18049920.

The previous prime is 30065989. The next prime is 30066007. The reversal of 30065997 is 79956003.

It is not a de Polignac number, because 30065997 - 2³ = 30065989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30065977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7803 + ... + 11000.

It is an arithmetic number, because the mean of its divisors is an integer number (2764188).

Almost surely, 2^30065997 is an apocalyptic number.

It is an amenable number.

30065997 is a deficient number, since it is larger than the sum of its proper divisors (14161011).

30065997 is a wasteful number, since it uses less digits than its factorization.

30065997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18860.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 30065997 is about 5483.2469395423. The cubic root of 30065997 is about 310.9509370741.

The spelling of 30065997 in words is "thirty million, sixty-five thousand, nine hundred ninety-seven".