816624973 has 4 divisors (see below), whose sum is σ = 816716160. Its totient is φ = 816533788.

The previous prime is 816624961. The next prime is 816624989. The reversal of 816624973 is 379426618.

816624973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816624973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816624923) 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, 30493 + ... + 50626.

It is an arithmetic number, because the mean of its divisors is an integer number (204179040).

Almost surely, 2^816624973 is an apocalyptic number.

It is an amenable number.

816624973 is a deficient number, since it is larger than the sum of its proper divisors (91187).

816624973 is a wasteful number, since it uses less digits than its factorization.

816624973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91186.

The product of its digits is 435456, while the sum is 46.

The square root of 816624973 is about 28576.6508359535. The cubic root of 816624973 is about 934.7042533610.

The spelling of 816624973 in words is "eight hundred sixteen million, six hundred twenty-four thousand, nine hundred seventy-three".