320877761 has 4 divisors (see below), whose sum is σ = 334828992. Its totient is φ = 306926532.

The previous prime is 320877743. The next prime is 320877769. The reversal of 320877761 is 167778023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320877761 - 2²⁶ = 253768897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320877769) 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, 6975581 + ... + 6975626.

It is an arithmetic number, because the mean of its divisors is an integer number (83707248).

Almost surely, 2^320877761 is an apocalyptic number.

It is an amenable number.

320877761 is a deficient number, since it is larger than the sum of its proper divisors (13951231).

320877761 is a wasteful number, since it uses less digits than its factorization.

320877761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13951230.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 320877761 is about 17913.0611845100. The cubic root of 320877761 is about 684.6152036349.

The spelling of 320877761 in words is "three hundred twenty million, eight hundred seventy-seven thousand, seven hundred sixty-one".