78393 has 8 divisors (see below), whose sum is σ = 119488. Its totient is φ = 44784.

The previous prime is 78367. The next prime is 78401. The reversal of 78393 is 39387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78393 - 2⁸ = 78137 is a prime.

It is a super-2 number, since 2×78393² = 12290924898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78393.

It is not an unprimeable number, because it can be changed into a prime (78193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846 + ... + 1887.

It is an arithmetic number, because the mean of its divisors is an integer number (14936).

2⁷⁸³⁹³ is an apocalyptic number.

It is an amenable number.

78393 is a deficient number, since it is larger than the sum of its proper divisors (41095).

78393 is a wasteful number, since it uses less digits than its factorization.

78393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its digits is 4536, while the sum is 30.

The square root of 78393 is about 279.9874997210. The cubic root of 78393 is about 42.7982253901.

The spelling of 78393 in words is "seventy-eight thousand, three hundred ninety-three".