30799999 has 4 divisors (see below), whose sum is σ = 30834720. Its totient is φ = 30765280.

The previous prime is 30799973. The next prime is 30800009. The reversal of 30799999 is 99999703.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30799999 - 2¹⁹ = 30275711 is a prime.

It is a Duffinian number.

30799999 is a modest number, since divided by 9999 gives 3079 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30799919) 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, 15994 + ... + 17815.

It is an arithmetic number, because the mean of its divisors is an integer number (7708680).

Almost surely, 2^30799999 is an apocalyptic number.

30799999 is a deficient number, since it is larger than the sum of its proper divisors (34721).

30799999 is an equidigital number, since it uses as much as digits as its factorization.

30799999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34720.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 30799999 is about 5549.7746801109. The cubic root of 30799999 is about 313.4610380557.

The spelling of 30799999 in words is "thirty million, seven hundred ninety-nine thousand, nine hundred ninety-nine".