78293 has 4 divisors (see below), whose sum is σ = 79680. Its totient is φ = 76908.

The previous prime is 78283. The next prime is 78301. The reversal of 78293 is 39287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39287 = 17 ⋅2311.

It is a cyclic number.

It is not a de Polignac number, because 78293 - 2⁴ = 78277 is a prime.

It is a super-2 number, since 2×78293² = 12259587698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78203) 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, 605 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (19920).

2⁷⁸²⁹³ is an apocalyptic number.

It is an amenable number.

78293 is a deficient number, since it is larger than the sum of its proper divisors (1387).

78293 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 13 representation: 78293 = (29837)₁₃.

78293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 3024, while the sum is 29.

The square root of 78293 is about 279.8088633335. The cubic root of 78293 is about 42.7800194973.

The spelling of 78293 in words is "seventy-eight thousand, two hundred ninety-three".