87680919 has 16 divisors (see below), whose sum is σ = 121010400. Its totient is φ = 56432640.

The previous prime is 87680911. The next prime is 87680933. The reversal of 87680919 is 91908678.

It is a happy number.

It is not a de Polignac number, because 87680919 - 2³ = 87680911 is a prime.

It is a super-2 number, since 2×87680919² = 15375887113369122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87680911) 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, 8257 + ... + 15605.

It is an arithmetic number, because the mean of its divisors is an integer number (7563150).

Almost surely, 2^87680919 is an apocalyptic number.

87680919 is a deficient number, since it is larger than the sum of its proper divisors (33329481).

87680919 is a wasteful number, since it uses less digits than its factorization.

87680919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7490.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 87680919 is about 9363.8090006151. The cubic root of 87680919 is about 444.2577687122.

The spelling of 87680919 in words is "eighty-seven million, six hundred eighty thousand, nine hundred nineteen".