320807953 has 2 divisors, whose sum is σ = 320807954. Its totient is φ = 320807952.

The previous prime is 320807941. The next prime is 320808001. The reversal of 320807953 is 359708023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267911424 + 52896529 = 16368^2 + 7273^2 .

It is an emirp because it is prime and its reverse (359708023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320807953 - 2¹³ = 320799761 is a prime.

It is not a weakly prime, because it can be changed into another prime (320807923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160403976 + 160403977.

It is an arithmetic number, because the mean of its divisors is an integer number (160403977).

Almost surely, 2^320807953 is an apocalyptic number.

It is an amenable number.

320807953 is a deficient number, since it is larger than the sum of its proper divisors (1).

320807953 is an equidigital number, since it uses as much as digits as its factorization.

320807953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 320807953 is about 17911.1125561758. The cubic root of 320807953 is about 684.5655532798.

The spelling of 320807953 in words is "three hundred twenty million, eight hundred seven thousand, nine hundred fifty-three".