509000087 has 2 divisors, whose sum is σ = 509000088. Its totient is φ = 509000086.

The previous prime is 508999999. The next prime is 509000099. The reversal of 509000087 is 780000905.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509000087 - 2¹⁰ = 508999063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509005087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254500043 + 254500044.

It is an arithmetic number, because the mean of its divisors is an integer number (254500044).

Almost surely, 2^509000087 is an apocalyptic number.

509000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

509000087 is an equidigital number, since it uses as much as digits as its factorization.

509000087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 509000087 is about 22561.0302734605. The cubic root of 509000087 is about 798.4344837595.

The spelling of 509000087 in words is "five hundred nine million, eighty-seven", and thus it is an aban number.