505313239 has 2 divisors, whose sum is σ = 505313240. Its totient is φ = 505313238.

The previous prime is 505313191. The next prime is 505313251. The reversal of 505313239 is 932313505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505313239 is a prime.

It is a super-2 number, since 2×505313239² = 510682939017342242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505313239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505313279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252656619 + 252656620.

It is an arithmetic number, because the mean of its divisors is an integer number (252656620).

Almost surely, 2^505313239 is an apocalyptic number.

505313239 is a deficient number, since it is larger than the sum of its proper divisors (1).

505313239 is an equidigital number, since it uses as much as digits as its factorization.

505313239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 505313239 is about 22479.1734501071. The cubic root of 505313239 is about 796.5020396123.

The spelling of 505313239 in words is "five hundred five million, three hundred thirteen thousand, two hundred thirty-nine".