505137317 has 4 divisors (see below), whose sum is σ = 505227756. Its totient is φ = 505046880.

The previous prime is 505137251. The next prime is 505137319. The reversal of 505137317 is 713731505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137686756 + 367450561 = 11734^2 + 19169^2 .

It is a cyclic number.

It is not a de Polignac number, because 505137317 - 2²⁴ = 488360101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505137319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36248 + ... + 48209.

It is an arithmetic number, because the mean of its divisors is an integer number (126306939).

Almost surely, 2^505137317 is an apocalyptic number.

It is an amenable number.

505137317 is a deficient number, since it is larger than the sum of its proper divisors (90439).

505137317 is an equidigital number, since it uses as much as digits as its factorization.

505137317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90438.

The product of its (nonzero) digits is 11025, while the sum is 32.

The square root of 505137317 is about 22475.2601097295. The cubic root of 505137317 is about 796.4095962952.

The spelling of 505137317 in words is "five hundred five million, one hundred thirty-seven thousand, three hundred seventeen".