509408687 has 2 divisors, whose sum is σ = 509408688. Its totient is φ = 509408686.

The previous prime is 509408681. The next prime is 509408747. The reversal of 509408687 is 786804905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509408687 - 2⁴ = 509408671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509408681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254704343 + 254704344.

It is an arithmetic number, because the mean of its divisors is an integer number (254704344).

Almost surely, 2^509408687 is an apocalyptic number.

509408687 is a deficient number, since it is larger than the sum of its proper divisors (1).

509408687 is an equidigital number, since it uses as much as digits as its factorization.

509408687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 509408687 is about 22570.0838943944. The cubic root of 509408687 is about 798.6480744711.

The spelling of 509408687 in words is "five hundred nine million, four hundred eight thousand, six hundred eighty-seven".