512709987 has 18 divisors (see below), whose sum is σ = 727136868. Its totient is φ = 321282048.

The previous prime is 512709983. The next prime is 512710013. The reversal of 512709987 is 789907215.

It is not a de Polignac number, because 512709987 - 2² = 512709983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (512709983) 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 17 ways as a sum of consecutive naturals, for example, 666339 + ... + 667107.

Almost surely, 2^512709987 is an apocalyptic number.

512709987 is a deficient number, since it is larger than the sum of its proper divisors (214426881).

512709987 is an frugal number, since it uses more digits than its factorization.

512709987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 48.

The square root of 512709987 is about 22643.1002073479. The cubic root of 512709987 is about 800.3696141013.

Multiplying 512709987 by its sum of digits (48), we get a square (24610079376 = 156876²).

The spelling of 512709987 in words is "five hundred twelve million, seven hundred nine thousand, nine hundred eighty-seven".