504725989 has 4 divisors (see below), whose sum is σ = 504773856. Its totient is φ = 504678124.

The previous prime is 504725981. The next prime is 504726011. The reversal of 504725989 is 989527405.

504725989 = T₁₈₃₄₂ + T₁₈₃₄₃ + T₁₈₃₄₄.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 504725989 - 2³ = 504725981 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 (504725981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409 + ... + 31774.

It is an arithmetic number, because the mean of its divisors is an integer number (126193464).

Almost surely, 2^504725989 is an apocalyptic number.

504725989 is the 18344-th centered triangular number.

It is an amenable number.

504725989 is a deficient number, since it is larger than the sum of its proper divisors (47867).

504725989 is a wasteful number, since it uses less digits than its factorization.

504725989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47866.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 504725989 is about 22466.1075622815. The cubic root of 504725989 is about 796.1933682769.

The spelling of 504725989 in words is "five hundred four million, seven hundred twenty-five thousand, nine hundred eighty-nine".