78719 has 4 divisors (see below), whose sum is σ = 79296. Its totient is φ = 78144.

The previous prime is 78713. The next prime is 78721. The reversal of 78719 is 91787.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91787 = 263 ⋅349.

It is a cyclic number.

It is not a de Polignac number, because 78719 - 2¹² = 74623 is a prime.

It is a super-2 number, since 2×78719² = 12393361922, which contains 22 as substring.

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 (78713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 399.

It is an arithmetic number, because the mean of its divisors is an integer number (19824).

2⁷⁸⁷¹⁹ is an apocalyptic number.

78719 is a deficient number, since it is larger than the sum of its proper divisors (577).

78719 is a wasteful number, since it uses less digits than its factorization.

78719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its digits is 3528, while the sum is 32.

The square root of 78719 is about 280.5690645813. The cubic root of 78719 is about 42.8574693097.

Subtracting from 78719 its sum of digits (32), we obtain a palindrome (78687).

It can be divided in two parts, 78 and 719, that added together give a palindrome (797).

The spelling of 78719 in words is "seventy-eight thousand, seven hundred nineteen".