987599 has 2 divisors, whose sum is σ = 987600. Its totient is φ = 987598.

The previous prime is 987593. The next prime is 987607. The reversal of 987599 is 995789.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493799 + 493800.

It is an arithmetic number, because the mean of its divisors is an integer number (493800).

2⁹⁸⁷⁵⁹⁹ is an apocalyptic number.

987599 is a deficient number, since it is larger than the sum of its proper divisors (1).

987599 is an equidigital number, since it uses as much as digits as its factorization.

987599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 47.

The square root of 987599 is about 993.7801567751. The cubic root of 987599 is about 99.5849127430.

The spelling of 987599 in words is "nine hundred eighty-seven thousand, five hundred ninety-nine".