78799 has 4 divisors (see below), whose sum is σ = 90064. Its totient is φ = 67536.

The previous prime is 78797. The next prime is 78803. The reversal of 78799 is 99787.

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

It is not a de Polignac number, because 78799 - 2¹ = 78797 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78791) 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, 5622 + ... + 5635.

It is an arithmetic number, because the mean of its divisors is an integer number (22516).

2⁷⁸⁷⁹⁹ is an apocalyptic number.

78799 is a deficient number, since it is larger than the sum of its proper divisors (11265).

78799 is a wasteful number, since it uses less digits than its factorization.

78799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11264.

The product of its digits is 31752, while the sum is 40.

The square root of 78799 is about 280.7115957705. The cubic root of 78799 is about 42.8719826916.

The spelling of 78799 in words is "seventy-eight thousand, seven hundred ninety-nine".