504697991 has 12 divisors (see below), whose sum is σ = 607344120. Its totient is φ = 417679920.

The previous prime is 504697981. The next prime is 504697997. The reversal of 504697991 is 199796405.

It is not a de Polignac number, because 504697991 - 2⁶ = 504697927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504697997) 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 in 11 ways as a sum of consecutive naturals, for example, 176165 + ... + 179006.

It is an arithmetic number, because the mean of its divisors is an integer number (50612010).

Almost surely, 2^504697991 is an apocalyptic number.

504697991 is a deficient number, since it is larger than the sum of its proper divisors (102646129).

504697991 is a wasteful number, since it uses less digits than its factorization.

504697991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355214 (or 355207 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 504697991 is about 22465.4844372428. The cubic root of 504697991 is about 796.1786459426.

The spelling of 504697991 in words is "five hundred four million, six hundred ninety-seven thousand, nine hundred ninety-one".