320858917 has 2 divisors, whose sum is σ = 320858918. Its totient is φ = 320858916.

The previous prime is 320858861. The next prime is 320858957. The reversal of 320858917 is 719858023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267845956 + 53012961 = 16366^2 + 7281^2 .

It is a cyclic number.

It is not a de Polignac number, because 320858917 - 2⁷ = 320858789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320858957) 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 as a sum of consecutive naturals, namely, 160429458 + 160429459.

It is an arithmetic number, because the mean of its divisors is an integer number (160429459).

Almost surely, 2^320858917 is an apocalyptic number.

It is an amenable number.

320858917 is a deficient number, since it is larger than the sum of its proper divisors (1).

320858917 is an equidigital number, since it uses as much as digits as its factorization.

320858917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 320858917 is about 17912.5351918705. The cubic root of 320858917 is about 684.6018017074.

The spelling of 320858917 in words is "three hundred twenty million, eight hundred fifty-eight thousand, nine hundred seventeen".