78087 has 4 divisors (see below), whose sum is σ = 104120. Its totient is φ = 52056.

The previous prime is 78079. The next prime is 78101.

It is a happy number.

78087 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 78087 - 2³ = 78079 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13012 + ... + 13017.

It is an arithmetic number, because the mean of its divisors is an integer number (26030).

2⁷⁸⁰⁸⁷ is an apocalyptic number.

78087 is a deficient number, since it is larger than the sum of its proper divisors (26033).

78087 is a wasteful number, since it uses less digits than its factorization.

78087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26032.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 78087 is about 279.4405124530. The cubic root of 78087 is about 42.7424664403.

The spelling of 78087 in words is "seventy-eight thousand, eighty-seven".