320329811 has 4 divisors (see below), whose sum is σ = 320368272. Its totient is φ = 320291352.

The previous prime is 320329787. The next prime is 320329819. The reversal of 320329811 is 118923023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320329811 - 2¹⁸ = 320067667 is a prime.

It is a super-2 number, since 2×320329811² = 205222375630591442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320329819) 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, 935 + ... + 25328.

It is an arithmetic number, because the mean of its divisors is an integer number (80092068).

Almost surely, 2^320329811 is an apocalyptic number.

320329811 is a deficient number, since it is larger than the sum of its proper divisors (38461).

320329811 is a wasteful number, since it uses less digits than its factorization.

320329811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38460.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 320329811 is about 17897.7599436354. The cubic root of 320329811 is about 684.2252850184.

The spelling of 320329811 in words is "three hundred twenty million, three hundred twenty-nine thousand, eight hundred eleven".