504391993 has 8 divisors (see below), whose sum is σ = 606787520. Its totient is φ = 409581360.

The previous prime is 504391991. The next prime is 504391999. The reversal of 504391993 is 399193405.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 504391993 - 2¹ = 504391991 is a prime.

It is a super-2 number, since 2×504391993² = 508822565205024098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504391991) 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 7 ways as a sum of consecutive naturals, for example, 1896078 + ... + 1896343.

It is an arithmetic number, because the mean of its divisors is an integer number (75848440).

Almost surely, 2^504391993 is an apocalyptic number.

It is an amenable number.

504391993 is a deficient number, since it is larger than the sum of its proper divisors (102395527).

504391993 is a wasteful number, since it uses less digits than its factorization.

504391993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792447.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 504391993 is about 22458.6730017604. The cubic root of 504391993 is about 796.0177059141.

The spelling of 504391993 in words is "five hundred four million, three hundred ninety-one thousand, nine hundred ninety-three".