78313 has 4 divisors (see below), whose sum is σ = 79488. Its totient is φ = 77140.

The previous prime is 78311. The next prime is 78317. The reversal of 78313 is 31387.

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.

It is a cyclic number.

It is not a de Polignac number, because 78313 - 2¹ = 78311 is a prime.

It is a super-2 number, since 2×78313² = 12265851938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78311) 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, 481 + ... + 622.

It is an arithmetic number, because the mean of its divisors is an integer number (19872).

2⁷⁸³¹³ is an apocalyptic number.

It is an amenable number.

78313 is a deficient number, since it is larger than the sum of its proper divisors (1175).

78313 is a wasteful number, since it uses less digits than its factorization.

78313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its digits is 504, while the sum is 22.

The square root of 78313 is about 279.8445997335. The cubic root of 78313 is about 42.7836619156.

The spelling of 78313 in words is "seventy-eight thousand, three hundred thirteen".