30797999 has 4 divisors (see below), whose sum is σ = 32609664. Its totient is φ = 28986336.

The previous prime is 30797959. The next prime is 30798013. The reversal of 30797999 is 99979703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99979703 = 17 ⋅5881159.

It is a cyclic number.

It is not a de Polignac number, because 30797999 - 2⁸ = 30797743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30797999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30797909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905807 + ... + 905840.

It is an arithmetic number, because the mean of its divisors is an integer number (8152416).

Almost surely, 2^30797999 is an apocalyptic number.

30797999 is a deficient number, since it is larger than the sum of its proper divisors (1811665).

30797999 is a wasteful number, since it uses less digits than its factorization.

30797999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811664.

The product of its (nonzero) digits is 964467, while the sum is 53.

The square root of 30797999 is about 5549.5944896902. The cubic root of 30797999 is about 313.4542530377.

The spelling of 30797999 in words is "thirty million, seven hundred ninety-seven thousand, nine hundred ninety-nine".