816445723 has 4 divisors (see below), whose sum is σ = 864471960. Its totient is φ = 768419488.

The previous prime is 816445711. The next prime is 816445727. The reversal of 816445723 is 327544618.

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 816445723 - 2⁵ = 816445691 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816445727) 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, 24013093 + ... + 24013126.

It is an arithmetic number, because the mean of its divisors is an integer number (216117990).

Almost surely, 2^816445723 is an apocalyptic number.

816445723 is a deficient number, since it is larger than the sum of its proper divisors (48026237).

816445723 is a wasteful number, since it uses less digits than its factorization.

816445723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48026236.

The product of its digits is 161280, while the sum is 40.

The square root of 816445723 is about 28573.5143620801. The cubic root of 816445723 is about 934.6358588497.

The spelling of 816445723 in words is "eight hundred sixteen million, four hundred forty-five thousand, seven hundred twenty-three".