687606587 has 2 divisors, whose sum is σ = 687606588. Its totient is φ = 687606586.

The previous prime is 687606487. The next prime is 687606607. The reversal of 687606587 is 785606786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687606587 - 2²⁰ = 686558011 is a prime.

It is not a weakly prime, because it can be changed into another prime (687606487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343803293 + 343803294.

It is an arithmetic number, because the mean of its divisors is an integer number (343803294).

Almost surely, 2^687606587 is an apocalyptic number.

687606587 is a deficient number, since it is larger than the sum of its proper divisors (1).

687606587 is an equidigital number, since it uses as much as digits as its factorization.

687606587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The square root of 687606587 is about 26222.2536598211. The cubic root of 687606587 is about 882.6326922913.

The spelling of 687606587 in words is "six hundred eighty-seven million, six hundred six thousand, five hundred eighty-seven".