320440697 has 4 divisors (see below), whose sum is σ = 320512896. Its totient is φ = 320368500.

The previous prime is 320440693. The next prime is 320440709. The reversal of 320440697 is 796044023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 796044023 = 17 ⋅46826119.

It is a cyclic number.

It is not a de Polignac number, because 320440697 - 2² = 320440693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320440693) 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, 28973 + ... + 38474.

It is an arithmetic number, because the mean of its divisors is an integer number (80128224).

Almost surely, 2^320440697 is an apocalyptic number.

It is an amenable number.

320440697 is a deficient number, since it is larger than the sum of its proper divisors (72199).

320440697 is an equidigital number, since it uses as much as digits as its factorization.

320440697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72198.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 320440697 is about 17900.8574375643. The cubic root of 320440697 is about 684.3042268355.

The spelling of 320440697 in words is "three hundred twenty million, four hundred forty thousand, six hundred ninety-seven".