30807999 has 16 divisors (see below), whose sum is σ = 46504800. Its totient is φ = 20150208.

The previous prime is 30807979. The next prime is 30808003. The reversal of 30807999 is 99970803.

It is a happy number.

It is not a de Polignac number, because 30807999 - 2⁷ = 30807871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30807919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9334 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (2906550).

Almost surely, 2^30807999 is an apocalyptic number.

30807999 is a deficient number, since it is larger than the sum of its proper divisors (15696801).

30807999 is a wasteful number, since it uses less digits than its factorization.

30807999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21591 (or 21585 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 30807999 is about 5550.4953832969. The cubic root of 30807999 is about 313.4881751910.

The spelling of 30807999 in words is "thirty million, eight hundred seven thousand, nine hundred ninety-nine".