78443 has 4 divisors (see below), whose sum is σ = 80160. Its totient is φ = 76728.

The previous prime is 78439. The next prime is 78467. The reversal of 78443 is 34487.

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

It is a cyclic number.

It is not a de Polignac number, because 78443 - 2² = 78439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78643) 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, 788 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (20040).

2⁷⁸⁴⁴³ is an apocalyptic number.

78443 is a deficient number, since it is larger than the sum of its proper divisors (1717).

78443 is a wasteful number, since it uses less digits than its factorization.

78443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its digits is 2688, while the sum is 26.

The square root of 78443 is about 280.0767751885. The cubic root of 78443 is about 42.8073225309.

Subtracting from 78443 its reverse (34487), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 7844 and 3, that multiplied together give a palindrome (23532).

The spelling of 78443 in words is "seventy-eight thousand, four hundred forty-three".