504591361 has 4 divisors (see below), whose sum is σ = 505271232. Its totient is φ = 503911492.

The previous prime is 504591343. The next prime is 504591377. The reversal of 504591361 is 163195405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163195405 = 5 ⋅32639081.

It is a cyclic number.

It is not a de Polignac number, because 504591361 - 2²³ = 496202753 is a prime.

It is a super-2 number, since 2×504591361² = 509224883191664642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504594361) 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, 338821 + ... + 340306.

It is an arithmetic number, because the mean of its divisors is an integer number (126317808).

Almost surely, 2^504591361 is an apocalyptic number.

It is an amenable number.

504591361 is a deficient number, since it is larger than the sum of its proper divisors (679871).

504591361 is an equidigital number, since it uses as much as digits as its factorization.

504591361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679870.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 504591361 is about 22463.1111157827. Note that the first 5 decimals coincide. The cubic root of 504591361 is about 796.1225711480.

The spelling of 504591361 in words is "five hundred four million, five hundred ninety-one thousand, three hundred sixty-one".