308893 has 4 divisors (see below), whose sum is σ = 332668. Its totient is φ = 285120.

The previous prime is 308887. The next prime is 308899. The reversal of 308893 is 398803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398803 = 17 ⋅23459.

It is an interprime number because it is at equal distance from previous prime (308887) and next prime (308899).

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 205209 = 322^2 + 453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308893 is a prime.

It is a Duffinian number.

308893 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11868 + ... + 11893.

It is an arithmetic number, because the mean of its divisors is an integer number (83167).

2³⁰⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

308893 is a deficient number, since it is larger than the sum of its proper divisors (23775).

308893 is a wasteful number, since it uses less digits than its factorization.

308893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23774.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 308893 is about 555.7814318597. The cubic root of 308893 is about 67.5983386028.

The spelling of 308893 in words is "three hundred eight thousand, eight hundred ninety-three".