504897521 has 2 divisors, whose sum is σ = 504897522. Its totient is φ = 504897520.

The previous prime is 504897479. The next prime is 504897539. The reversal of 504897521 is 125798405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287777296 + 217120225 = 16964^2 + 14735^2 .

It is a cyclic number.

It is not a de Polignac number, because 504897521 - 2¹⁸ = 504635377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (504897551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252448760 + 252448761.

It is an arithmetic number, because the mean of its divisors is an integer number (252448761).

Almost surely, 2^504897521 is an apocalyptic number.

It is an amenable number.

504897521 is a deficient number, since it is larger than the sum of its proper divisors (1).

504897521 is an equidigital number, since it uses as much as digits as its factorization.

504897521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 504897521 is about 22469.9248107331. The cubic root of 504897521 is about 796.2835539587.

The spelling of 504897521 in words is "five hundred four million, eight hundred ninety-seven thousand, five hundred twenty-one".