308393 has 4 divisors (see below), whose sum is σ = 313680. Its totient is φ = 303108.

The previous prime is 308383. The next prime is 308411. The reversal of 308393 is 393803.

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: 393803 = 197 ⋅1999.

It is a cyclic number.

It is not a de Polignac number, because 308393 - 2⁸ = 308137 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (308303) 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, 2555 + ... + 2672.

It is an arithmetic number, because the mean of its divisors is an integer number (78420).

2³⁰⁸³⁹³ is an apocalyptic number.

It is an amenable number.

308393 is a deficient number, since it is larger than the sum of its proper divisors (5287).

308393 is an equidigital number, since it uses as much as digits as its factorization.

308393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 308393 is about 555.3314325698. The cubic root of 308393 is about 67.5618454671.

The spelling of 308393 in words is "three hundred eight thousand, three hundred ninety-three".