320959967 has 4 divisors (see below), whose sum is σ = 323004456. Its totient is φ = 318915480.

The previous prime is 320959943. The next prime is 320959981. The reversal of 320959967 is 769959023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769959023 = 2731 ⋅281933.

It is a cyclic number.

It is not a de Polignac number, because 320959967 - 2¹⁰ = 320958943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320959937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022009 + ... + 1022322.

It is an arithmetic number, because the mean of its divisors is an integer number (80751114).

Almost surely, 2^320959967 is an apocalyptic number.

320959967 is a deficient number, since it is larger than the sum of its proper divisors (2044489).

320959967 is a wasteful number, since it uses less digits than its factorization.

320959967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044488.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 320959967 is about 17915.3556202494. The cubic root of 320959967 is about 684.6736627314.

The spelling of 320959967 in words is "three hundred twenty million, nine hundred fifty-nine thousand, nine hundred sixty-seven".