823353165 has 12 divisors (see below), whose sum is σ = 1427145564. Its totient is φ = 439121664.

The previous prime is 823353161. The next prime is 823353187. The reversal of 823353165 is 561353328.

823353165 is a `hidden beast` number, since 8 + 2 + 335 + 316 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 106131204 + 717221961 = 10302^2 + 26781^2 .

It is not a de Polignac number, because 823353165 - 2² = 823353161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823353161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9148324 + ... + 9148413.

It is an arithmetic number, because the mean of its divisors is an integer number (118928797).

Almost surely, 2^823353165 is an apocalyptic number.

It is an amenable number.

823353165 is a deficient number, since it is larger than the sum of its proper divisors (603792399).

823353165 is a wasteful number, since it uses less digits than its factorization.

823353165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18296748 (or 18296745 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 823353165 is about 28694.1311943749. The cubic root of 823353165 is about 937.2642521895.

The spelling of 823353165 in words is "eight hundred twenty-three million, three hundred fifty-three thousand, one hundred sixty-five".