509469987 has 32 divisors (see below), whose sum is σ = 775950336. Its totient is φ = 294940800.

The previous prime is 509469967. The next prime is 509469997. The reversal of 509469987 is 789964905.

It is not a de Polignac number, because 509469987 - 2⁷ = 509469859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (509469967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50062 + ... + 59372.

It is an arithmetic number, because the mean of its divisors is an integer number (24248448).

Almost surely, 2^509469987 is an apocalyptic number.

509469987 is a deficient number, since it is larger than the sum of its proper divisors (266480349).

509469987 is a wasteful number, since it uses less digits than its factorization.

509469987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9411.

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 509469987 is about 22571.4418458370. The cubic root of 509469987 is about 798.6801084513.

The spelling of 509469987 in words is "five hundred nine million, four hundred sixty-nine thousand, nine hundred eighty-seven".