78343 has 4 divisors (see below), whose sum is σ = 79000. Its totient is φ = 77688.

The previous prime is 78341. The next prime is 78347. The reversal of 78343 is 34387.

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: 34387 = 137 ⋅251.

It is a cyclic number.

It is not a de Polignac number, because 78343 - 2¹ = 78341 is a prime.

It is a super-2 number, since 2×78343² = 12275251298, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78341) 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, 93 + ... + 406.

It is an arithmetic number, because the mean of its divisors is an integer number (19750).

2⁷⁸³⁴³ is an apocalyptic number.

78343 is a deficient number, since it is larger than the sum of its proper divisors (657).

78343 is a wasteful number, since it uses less digits than its factorization.

78343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its digits is 2016, while the sum is 25.

The square root of 78343 is about 279.8981957784. The cubic root of 78343 is about 42.7891243803.

Subtracting from 78343 its reverse (34387), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 78343 in words is "seventy-eight thousand, three hundred forty-three".