320131693 has 4 divisors (see below), whose sum is σ = 365864800. Its totient is φ = 274398588.

The previous prime is 320131681. The next prime is 320131727. The reversal of 320131693 is 396131023.

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 320131693 - 2²⁵ = 286577261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131663) 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, 22866543 + ... + 22866556.

It is an arithmetic number, because the mean of its divisors is an integer number (91466200).

Almost surely, 2^320131693 is an apocalyptic number.

It is an amenable number.

320131693 is a deficient number, since it is larger than the sum of its proper divisors (45733107).

320131693 is an equidigital number, since it uses as much as digits as its factorization.

320131693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45733106.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 320131693 is about 17892.2243726150. The cubic root of 320131693 is about 684.0841957447.

The spelling of 320131693 in words is "three hundred twenty million, one hundred thirty-one thousand, six hundred ninety-three".