504628921 has 2 divisors, whose sum is σ = 504628922. Its totient is φ = 504628920.

The previous prime is 504628909. The next prime is 504628931. The reversal of 504628921 is 129826405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498182400 + 6446521 = 22320^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 504628921 - 2¹³ = 504620729 is a prime.

It is not a weakly prime, because it can be changed into another prime (504628931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252314460 + 252314461.

It is an arithmetic number, because the mean of its divisors is an integer number (252314461).

Almost surely, 2^504628921 is an apocalyptic number.

It is an amenable number.

504628921 is a deficient number, since it is larger than the sum of its proper divisors (1).

504628921 is an equidigital number, since it uses as much as digits as its factorization.

504628921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 504628921 is about 22463.9471375803. The cubic root of 504628921 is about 796.1423241760.

The spelling of 504628921 in words is "five hundred four million, six hundred twenty-eight thousand, nine hundred twenty-one".