508645987 has 2 divisors, whose sum is σ = 508645988. Its totient is φ = 508645986.

The previous prime is 508645961. The next prime is 508646029. The reversal of 508645987 is 789546805.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 508645987 - 2⁷ = 508645859 is a prime.

It is not a weakly prime, because it can be changed into another prime (508645387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254322993 + 254322994.

It is an arithmetic number, because the mean of its divisors is an integer number (254322994).

Almost surely, 2^508645987 is an apocalyptic number.

508645987 is a deficient number, since it is larger than the sum of its proper divisors (1).

508645987 is an equidigital number, since it uses as much as digits as its factorization.

508645987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The square root of 508645987 is about 22553.1813055276. The cubic root of 508645987 is about 798.2492897911.

The spelling of 508645987 in words is "five hundred eight million, six hundred forty-five thousand, nine hundred eighty-seven".