78359 has 4 divisors (see below), whose sum is σ = 79104. Its totient is φ = 77616.

The previous prime is 78347. The next prime is 78367. The reversal of 78359 is 95387.

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.

It is a cyclic number.

It is not a de Polignac number, because 78359 - 2¹⁶ = 12823 is a prime.

It is a super-2 number, since 2×78359² = 12280265762, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78059) 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, 182 + ... + 435.

It is an arithmetic number, because the mean of its divisors is an integer number (19776).

2⁷⁸³⁵⁹ is an apocalyptic number.

78359 is a deficient number, since it is larger than the sum of its proper divisors (745).

78359 is a wasteful number, since it uses less digits than its factorization.

78359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

The product of its digits is 7560, while the sum is 32.

The square root of 78359 is about 279.9267761398. The cubic root of 78359 is about 42.7920371246.

The spelling of 78359 in words is "seventy-eight thousand, three hundred fifty-nine".