30318997 has 4 divisors (see below), whose sum is σ = 30342636. Its totient is φ = 30295360.

The previous prime is 30318989. The next prime is 30319031. The reversal of 30318997 is 79981303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79981303 = 3547 ⋅22549.

It can be written as a sum of positive squares in 2 ways, for example, as 15256836 + 15062161 = 3906^2 + 3881^2 .

It is a cyclic number.

It is not a de Polignac number, because 30318997 - 2³ = 30318989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30318097) 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 3 ways as a sum of consecutive naturals, for example, 9778 + ... + 12499.

It is an arithmetic number, because the mean of its divisors is an integer number (7585659).

Almost surely, 2^30318997 is an apocalyptic number.

It is an amenable number.

30318997 is a deficient number, since it is larger than the sum of its proper divisors (23639).

30318997 is a wasteful number, since it uses less digits than its factorization.

30318997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 30318997 is about 5506.2688819200. The cubic root of 30318997 is about 311.8207008652.

The spelling of 30318997 in words is "thirty million, three hundred eighteen thousand, nine hundred ninety-seven".