78383 has 4 divisors (see below), whose sum is σ = 79248. Its totient is φ = 77520.

The previous prime is 78367. The next prime is 78401. The reversal of 78383 is 38387.

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: 38387 = 23 ⋅1669.

It is a cyclic number.

It is not a de Polignac number, because 78383 - 2⁴ = 78367 is a prime.

It is a super-2 number, since 2×78383² = 12287789378, 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 (78283) 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, 278 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (19812).

2⁷⁸³⁸³ is an apocalyptic number.

78383 is a deficient number, since it is larger than the sum of its proper divisors (865).

78383 is a wasteful number, since it uses less digits than its factorization.

78383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its digits is 4032, while the sum is 29.

The square root of 78383 is about 279.9696412113. The cubic root of 78383 is about 42.7964054978.

The spelling of 78383 in words is "seventy-eight thousand, three hundred eighty-three".