320823311 has 4 divisors (see below), whose sum is σ = 322615800. Its totient is φ = 319030824.

The previous prime is 320823287. The next prime is 320823313. The reversal of 320823311 is 113328023.

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 320823311 - 2²² = 316629007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320823313) 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, 895976 + ... + 896333.

It is an arithmetic number, because the mean of its divisors is an integer number (80653950).

Almost surely, 2^320823311 is an apocalyptic number.

320823311 is a deficient number, since it is larger than the sum of its proper divisors (1792489).

320823311 is a wasteful number, since it uses less digits than its factorization.

320823311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792488.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 320823311 is about 17911.5412792981. The cubic root of 320823311 is about 684.5764771466.

The spelling of 320823311 in words is "three hundred twenty million, eight hundred twenty-three thousand, three hundred eleven".