504113921 has 2 divisors, whose sum is σ = 504113922. Its totient is φ = 504113920.

The previous prime is 504113917. The next prime is 504113923. The reversal of 504113921 is 129311405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425968321 + 78145600 = 20639^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 504113921 - 2² = 504113917 is a prime.

Together with 504113923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (504113923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252056960 + 252056961.

It is an arithmetic number, because the mean of its divisors is an integer number (252056961).

Almost surely, 2^504113921 is an apocalyptic number.

It is an amenable number.

504113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

504113921 is an equidigital number, since it uses as much as digits as its factorization.

504113921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 504113921 is about 22452.4813996137. The cubic root of 504113921 is about 795.8713971384.

The spelling of 504113921 in words is "five hundred four million, one hundred thirteen thousand, nine hundred twenty-one".