320303693 has 2 divisors, whose sum is σ = 320303694. Its totient is φ = 320303692.

The previous prime is 320303657. The next prime is 320303699. The reversal of 320303693 is 396303023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202407529 + 117896164 = 14227^2 + 10858^2 .

It is an emirp because it is prime and its reverse (396303023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320303693 - 2⁶ = 320303629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320303699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160151846 + 160151847.

It is an arithmetic number, because the mean of its divisors is an integer number (160151847).

Almost surely, 2^320303693 is an apocalyptic number.

It is an amenable number.

320303693 is a deficient number, since it is larger than the sum of its proper divisors (1).

320303693 is an equidigital number, since it uses as much as digits as its factorization.

320303693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 29.

The square root of 320303693 is about 17897.0302843796. The cubic root of 320303693 is about 684.2066884750.

The spelling of 320303693 in words is "three hundred twenty million, three hundred three thousand, six hundred ninety-three".