78827 has 4 divisors (see below), whose sum is σ = 90096. Its totient is φ = 67560.

The previous prime is 78823. The next prime is 78839. The reversal of 78827 is 72887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72887 = 23 ⋅3169.

It is a cyclic number.

It is not a de Polignac number, because 78827 - 2² = 78823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78793 and 78802.

It is not an unprimeable number, because it can be changed into a prime (78823) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5624 + ... + 5637.

It is an arithmetic number, because the mean of its divisors is an integer number (22524).

2⁷⁸⁸²⁷ is an apocalyptic number.

78827 is a deficient number, since it is larger than the sum of its proper divisors (11269).

78827 is a wasteful number, since it uses less digits than its factorization.

78827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11268.

The product of its digits is 6272, while the sum is 32.

The square root of 78827 is about 280.7614645923. The cubic root of 78827 is about 42.8770600545.

The spelling of 78827 in words is "seventy-eight thousand, eight hundred twenty-seven".