320918087 has 4 divisors (see below), whose sum is σ = 366763536. Its totient is φ = 275072640.

The previous prime is 320918077. The next prime is 320918093. The reversal of 320918087 is 780819023.

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 320918087 - 2¹⁰ = 320917063 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 320918087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320918047) 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, 22922714 + ... + 22922727.

It is an arithmetic number, because the mean of its divisors is an integer number (91690884).

Almost surely, 2^320918087 is an apocalyptic number.

320918087 is a deficient number, since it is larger than the sum of its proper divisors (45845449).

320918087 is an equidigital number, since it uses as much as digits as its factorization.

320918087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45845448.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 320918087 is about 17914.1867524038. The cubic root of 320918087 is about 684.6438818831.

The spelling of 320918087 in words is "three hundred twenty million, nine hundred eighteen thousand, eighty-seven".