823173057 has 32 divisors (see below), whose sum is σ = 1400053760. Its totient is φ = 468251280.

The previous prime is 823173053. The next prime is 823173067. The reversal of 823173057 is 750371328.

It is not a de Polignac number, because 823173057 - 2² = 823173053 is a prime.

It is a super-2 number, since 2×823173057² = 1355227763541450498, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (823173053) 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 31 ways as a sum of consecutive naturals, for example, 32382 + ... + 51912.

It is an arithmetic number, because the mean of its divisors is an integer number (43751680).

Almost surely, 2^823173057 is an apocalyptic number.

It is an amenable number.

823173057 is a deficient number, since it is larger than the sum of its proper divisors (576880703).

823173057 is a wasteful number, since it uses less digits than its factorization.

823173057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19770 (or 19764 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 823173057 is about 28690.9926109223. The cubic root of 823173057 is about 937.1959052121.

The spelling of 823173057 in words is "eight hundred twenty-three million, one hundred seventy-three thousand, fifty-seven".