320540899 has 24 divisors (see below), whose sum is σ = 407576448. Its totient is φ = 250225920.

The previous prime is 320540897. The next prime is 320540939. The reversal of 320540899 is 998045023.

It is a happy number.

It is not a de Polignac number, because 320540899 - 2¹ = 320540897 is a prime.

It is a super-3 number, since 3×320540899³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320540897) 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 23 ways as a sum of consecutive naturals, for example, 19617 + ... + 32029.

It is an arithmetic number, because the mean of its divisors is an integer number (16982352).

Almost surely, 2^320540899 is an apocalyptic number.

320540899 is a deficient number, since it is larger than the sum of its proper divisors (87035549).

320540899 is a wasteful number, since it uses less digits than its factorization.

320540899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12475 (or 12468 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 320540899 is about 17903.6560232819. The cubic root of 320540899 is about 684.3755468508.

The spelling of 320540899 in words is "three hundred twenty million, five hundred forty thousand, eight hundred ninety-nine".