504720913 has 2 divisors, whose sum is σ = 504720914. Its totient is φ = 504720912.

The previous prime is 504720877. The next prime is 504720919. The reversal of 504720913 is 319027405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437939329 + 66781584 = 20927^2 + 8172^2 .

It is a cyclic number.

It is not a de Polignac number, because 504720913 - 2¹³ = 504712721 is a prime.

It is equal to p_26591125 and since 504720913 and 26591125 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (504720919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252360456 + 252360457.

It is an arithmetic number, because the mean of its divisors is an integer number (252360457).

Almost surely, 2^504720913 is an apocalyptic number.

It is an amenable number.

504720913 is a deficient number, since it is larger than the sum of its proper divisors (1).

504720913 is an equidigital number, since it uses as much as digits as its factorization.

504720913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 504720913 is about 22465.9945918270. The cubic root of 504720913 is about 796.1906991778.

The spelling of 504720913 in words is "five hundred four million, seven hundred twenty thousand, nine hundred thirteen".