659461987 has 16 divisors (see below), whose sum is σ = 685983168. Its totient is φ = 633592960.

The previous prime is 659461981. The next prime is 659461993. The reversal of 659461987 is 789164956.

It is an interprime number because it is at equal distance from previous prime (659461981) and next prime (659461993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659461987 is a prime.

It is a super-2 number, since 2×659461987² = 869780224595976338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659461981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650493 + ... + 651505.

It is an arithmetic number, because the mean of its divisors is an integer number (42873948).

Almost surely, 2^659461987 is an apocalyptic number.

659461987 is a deficient number, since it is larger than the sum of its proper divisors (26521181).

659461987 is a wasteful number, since it uses less digits than its factorization.

659461987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310.

The product of its digits is 3265920, while the sum is 55.

The square root of 659461987 is about 25679.9919587215. The cubic root of 659461987 is about 870.4221261495.

The spelling of 659461987 in words is "six hundred fifty-nine million, four hundred sixty-one thousand, nine hundred eighty-seven".