87819725 has 12 divisors (see below), whose sum is σ = 124453344. Its totient is φ = 60219120.

The previous prime is 87819713. The next prime is 87819733. The reversal of 87819725 is 52791878.

It is not a de Polignac number, because 87819725 - 2⁴ = 87819709 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 87819725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250739 + ... + 251088.

It is an arithmetic number, because the mean of its divisors is an integer number (10371112).

Almost surely, 2^87819725 is an apocalyptic number.

It is an amenable number.

87819725 is a deficient number, since it is larger than the sum of its proper divisors (36633619).

87819725 is a wasteful number, since it uses less digits than its factorization.

87819725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501844 (or 501839 counting only the distinct ones).

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

The square root of 87819725 is about 9371.2179037732. The cubic root of 87819725 is about 444.4920771287.

The spelling of 87819725 in words is "eighty-seven million, eight hundred nineteen thousand, seven hundred twenty-five".