87917825 has 6 divisors (see below), whose sum is σ = 109018134. Its totient is φ = 70334240.

The previous prime is 87917789. The next prime is 87917839. The reversal of 87917825 is 52871978.

It can be written as a sum of positive squares in 3 ways, for example, as 1129969 + 86787856 = 1063^2 + 9316^2 .

It is not a de Polignac number, because 87917825 - 2²⁰ = 86869249 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 87917825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1758332 + ... + 1758381.

It is an arithmetic number, because the mean of its divisors is an integer number (18169689).

Almost surely, 2^87917825 is an apocalyptic number.

It is an amenable number.

87917825 is a deficient number, since it is larger than the sum of its proper divisors (21100309).

87917825 is a wasteful number, since it uses less digits than its factorization.

87917825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516723 (or 3516718 counting only the distinct ones).

The product of its digits is 282240, while the sum is 47.

The square root of 87917825 is about 9376.4505544476. The cubic root of 87917825 is about 444.6575238111.

The spelling of 87917825 in words is "eighty-seven million, nine hundred seventeen thousand, eight hundred twenty-five".