87685819 has 18 divisors (see below), whose sum is σ = 97842780. Its totient is φ = 78545376.

The previous prime is 87685799. The next prime is 87685831. The reversal of 87685819 is 91858678.

It is not a de Polignac number, because 87685819 - 2⁹ = 87685307 is a prime.

It is a super-2 number, since 2×87685819² = 15377605707401522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87685219) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 231172 + ... + 231550.

It is an arithmetic number, because the mean of its divisors is an integer number (5435710).

Almost surely, 2^87685819 is an apocalyptic number.

87685819 is a deficient number, since it is larger than the sum of its proper divisors (10156961).

87685819 is a wasteful number, since it uses less digits than its factorization.

87685819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 429 counting only the distinct ones).

The product of its digits is 967680, while the sum is 52.

The square root of 87685819 is about 9364.0706426212. The cubic root of 87685819 is about 444.2660442585.

The spelling of 87685819 in words is "eighty-seven million, six hundred eighty-five thousand, eight hundred nineteen".