502425989 has 4 divisors (see below), whose sum is σ = 541074156. Its totient is φ = 463777824.

The previous prime is 502425983. The next prime is 502426019. The reversal of 502425989 is 989524205.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131285764 + 371140225 = 11458^2 + 19265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-502425989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502425983) 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, 19324064 + ... + 19324089.

It is an arithmetic number, because the mean of its divisors is an integer number (135268539).

Almost surely, 2^502425989 is an apocalyptic number.

It is an amenable number.

502425989 is a deficient number, since it is larger than the sum of its proper divisors (38648167).

502425989 is a wasteful number, since it uses less digits than its factorization.

502425989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38648166.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 502425989 is about 22414.8608962893. The cubic root of 502425989 is about 794.9821279423.

It can be divided in two parts, 5024 and 25989, that added together give a palindrome (31013).

The spelling of 502425989 in words is "five hundred two million, four hundred twenty-five thousand, nine hundred eighty-nine".