87816959 has 4 divisors (see below), whose sum is σ = 90845160. Its totient is φ = 84788760.

The previous prime is 87816941. The next prime is 87816973. The reversal of 87816959 is 95961878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87816959 - 2²⁴ = 71039743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87816959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87816929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514057 + ... + 1514114.

It is an arithmetic number, because the mean of its divisors is an integer number (22711290).

Almost surely, 2^87816959 is an apocalyptic number.

87816959 is a deficient number, since it is larger than the sum of its proper divisors (3028201).

87816959 is a wasteful number, since it uses less digits than its factorization.

87816959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028200.

The product of its digits is 1088640, while the sum is 53.

The square root of 87816959 is about 9371.0703230741. The cubic root of 87816959 is about 444.4874104550.

The spelling of 87816959 in words is "eighty-seven million, eight hundred sixteen thousand, nine hundred fifty-nine".