816077923 has 4 divisors (see below), whose sum is σ = 816402888. Its totient is φ = 815752960.

The previous prime is 816077903. The next prime is 816077929. The reversal of 816077923 is 329770618.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 816077923 - 2⁵ = 816077891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816077923.

It is not an unprimeable number, because it can be changed into a prime (816077929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158686 + ... + 163747.

It is an arithmetic number, because the mean of its divisors is an integer number (204100722).

Almost surely, 2^816077923 is an apocalyptic number.

816077923 is a deficient number, since it is larger than the sum of its proper divisors (324965).

816077923 is a wasteful number, since it uses less digits than its factorization.

816077923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324964.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 816077923 is about 28567.0776069237. The cubic root of 816077923 is about 934.4954899752.

The spelling of 816077923 in words is "eight hundred sixteen million, seventy-seven thousand, nine hundred twenty-three".