320876977 has 4 divisors (see below), whose sum is σ = 320958820. Its totient is φ = 320795136.

The previous prime is 320876929. The next prime is 320877031. The reversal of 320876977 is 779678023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779678023 = 37 ⋅21072379.

It can be written as a sum of positive squares in 2 ways, for example, as 167340096 + 153536881 = 12936^2 + 12391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320876977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320876977.

It is not an unprimeable number, because it can be changed into a prime (320876917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34728 + ... + 42985.

It is an arithmetic number, because the mean of its divisors is an integer number (80239705).

Almost surely, 2^320876977 is an apocalyptic number.

It is an amenable number.

320876977 is a deficient number, since it is larger than the sum of its proper divisors (81843).

320876977 is an equidigital number, since it uses as much as digits as its factorization.

320876977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81842.

The product of its (nonzero) digits is 889056, while the sum is 49.

The square root of 320876977 is about 17913.0393010232. The cubic root of 320876977 is about 684.6146460614.

The spelling of 320876977 in words is "three hundred twenty million, eight hundred seventy-six thousand, nine hundred seventy-seven".