320395907 has 4 divisors (see below), whose sum is σ = 345041760. Its totient is φ = 295750056.

The previous prime is 320395891. The next prime is 320395909. The reversal of 320395907 is 709593023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709593023 = 10211 ⋅69493.

It is a cyclic number.

It is not a de Polignac number, because 320395907 - 2⁴ = 320395891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320395909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12322907 + ... + 12322932.

It is an arithmetic number, because the mean of its divisors is an integer number (86260440).

Almost surely, 2^320395907 is an apocalyptic number.

320395907 is a deficient number, since it is larger than the sum of its proper divisors (24645853).

320395907 is a wasteful number, since it uses less digits than its factorization.

320395907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24645852.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 320395907 is about 17899.6063364533. The cubic root of 320395907 is about 684.2723421896.

The spelling of 320395907 in words is "three hundred twenty million, three hundred ninety-five thousand, nine hundred seven".