609695987 has 2 divisors, whose sum is σ = 609695988. Its totient is φ = 609695986.

The previous prime is 609695981. The next prime is 609696067. The reversal of 609695987 is 789596906.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 609695987 - 2⁶ = 609695923 is a prime.

It is not a weakly prime, because it can be changed into another prime (609695981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304847993 + 304847994.

It is an arithmetic number, because the mean of its divisors is an integer number (304847994).

Almost surely, 2^609695987 is an apocalyptic number.

609695987 is a deficient number, since it is larger than the sum of its proper divisors (1).

609695987 is an equidigital number, since it uses as much as digits as its factorization.

609695987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The square root of 609695987 is about 24692.0227401483. The cubic root of 609695987 is about 847.9516940822.

The spelling of 609695987 in words is "six hundred nine million, six hundred ninety-five thousand, nine hundred eighty-seven".