320577839 has 2 divisors, whose sum is σ = 320577840. Its totient is φ = 320577838.

The previous prime is 320577797. The next prime is 320577847. The reversal of 320577839 is 938775023.

It is a strong prime.

It is an emirp because it is prime and its reverse (938775023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320577839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320577839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320577539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160288919 + 160288920.

It is an arithmetic number, because the mean of its divisors is an integer number (160288920).

Almost surely, 2^320577839 is an apocalyptic number.

320577839 is a deficient number, since it is larger than the sum of its proper divisors (1).

320577839 is an equidigital number, since it uses as much as digits as its factorization.

320577839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 320577839 is about 17904.6876264290. The cubic root of 320577839 is about 684.4018356039.

The spelling of 320577839 in words is "three hundred twenty million, five hundred seventy-seven thousand, eight hundred thirty-nine".