320499999 has 24 divisors (see below), whose sum is σ = 488733440. Its totient is φ = 201829968.

The previous prime is 320499983. The next prime is 320500007. The reversal of 320499999 is 999994023.

It is not a de Polignac number, because 320499999 - 2⁴ = 320499983 is a prime.

It is a Duffinian number.

320499999 is a modest number, since divided by 99999 gives 3204 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320499299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60204 + ... + 65310.

Almost surely, 2^320499999 is an apocalyptic number.

320499999 is a deficient number, since it is larger than the sum of its proper divisors (168233441).

320499999 is a wasteful number, since it uses less digits than its factorization.

320499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499 (or 5496 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The square root of 320499999 is about 17902.5137620391. The cubic root of 320499999 is about 684.3464375645.

The spelling of 320499999 in words is "three hundred twenty million, four hundred ninety-nine thousand, nine hundred ninety-nine".