816435723 has 8 divisors (see below), whose sum is σ = 1103493328. Its totient is φ = 536834304.

The previous prime is 816435707. The next prime is 816435769. The reversal of 816435723 is 327534618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816435723 - 2⁴ = 816435707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816435703) 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 7 ways as a sum of consecutive naturals, for example, 1863790 + ... + 1864227.

It is an arithmetic number, because the mean of its divisors is an integer number (137936666).

Almost surely, 2^816435723 is an apocalyptic number.

816435723 is a deficient number, since it is larger than the sum of its proper divisors (287057605).

816435723 is a wasteful number, since it uses less digits than its factorization.

816435723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728093.

The product of its digits is 120960, while the sum is 39.

The square root of 816435723 is about 28573.3393743189. The cubic root of 816435723 is about 934.6320429616.

The spelling of 816435723 in words is "eight hundred sixteen million, four hundred thirty-five thousand, seven hundred twenty-three".