320755013 has 4 divisors (see below), whose sum is σ = 328578348. Its totient is φ = 312931680.

The previous prime is 320754991. The next prime is 320755073. The reversal of 320755013 is 310557023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45792289 + 274962724 = 6767^2 + 16582^2 .

It is not a de Polignac number, because 320755013 - 2¹⁰ = 320753989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320755073) 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, 3911606 + ... + 3911687.

It is an arithmetic number, because the mean of its divisors is an integer number (82144587).

Almost surely, 2^320755013 is an apocalyptic number.

It is an amenable number.

320755013 is a deficient number, since it is larger than the sum of its proper divisors (7823335).

320755013 is an equidigital number, since it uses as much as digits as its factorization.

320755013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7823334.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 320755013 is about 17909.6346417229. The cubic root of 320755013 is about 684.5278953459.

The spelling of 320755013 in words is "three hundred twenty million, seven hundred fifty-five thousand, thirteen".