816093923 has 4 divisors (see below), whose sum is σ = 816404880. Its totient is φ = 815782968.

The previous prime is 816093919. The next prime is 816093953. The reversal of 816093923 is 329390618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329390618 = 2 ⋅164695309.

It is a cyclic number.

It is not a de Polignac number, because 816093923 - 2² = 816093919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816093953) 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, 151508 + ... + 156801.

It is an arithmetic number, because the mean of its divisors is an integer number (204101220).

Almost surely, 2^816093923 is an apocalyptic number.

816093923 is a deficient number, since it is larger than the sum of its proper divisors (310957).

816093923 is a wasteful number, since it uses less digits than its factorization.

816093923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310956.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 816093923 is about 28567.3576481970. The cubic root of 816093923 is about 934.5015971658.

The spelling of 816093923 in words is "eight hundred sixteen million, ninety-three thousand, nine hundred twenty-three".