320312497 has 4 divisors (see below), whose sum is σ = 320563440. Its totient is φ = 320061556.

The previous prime is 320312477. The next prime is 320312533. The reversal of 320312497 is 794213023.

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 320312497 - 2²³ = 311923889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320312407) 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, 123547 + ... + 126112.

It is an arithmetic number, because the mean of its divisors is an integer number (80140860).

Almost surely, 2^320312497 is an apocalyptic number.

It is an amenable number.

320312497 is a deficient number, since it is larger than the sum of its proper divisors (250943).

320312497 is a wasteful number, since it uses less digits than its factorization.

320312497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250942.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 320312497 is about 17897.2762452838. The cubic root of 320312497 is about 684.2129572137.

The spelling of 320312497 in words is "three hundred twenty million, three hundred twelve thousand, four hundred ninety-seven".