823045172 has 12 divisors (see below), whose sum is σ = 1489995780. Its totient is φ = 397332096.

The previous prime is 823045127. The next prime is 823045229. The reversal of 823045172 is 271540328.

It can be written as a sum of positive squares in 2 ways, for example, as 607425316 + 215619856 = 24646^2 + 14684^2 .

It is a congruent number.

It is an unprimeable number.

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, 3547493 + ... + 3547724.

It is an arithmetic number, because the mean of its divisors is an integer number (124166315).

Almost surely, 2^823045172 is an apocalyptic number.

It is an amenable number.

823045172 is a deficient number, since it is larger than the sum of its proper divisors (666950608).

823045172 is a wasteful number, since it uses less digits than its factorization.

823045172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7095250 (or 7095248 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 823045172 is about 28688.7638632270. The cubic root of 823045172 is about 937.1473696482.

The spelling of 823045172 in words is "eight hundred twenty-three million, forty-five thousand, one hundred seventy-two".