823376161 has 4 divisors (see below), whose sum is σ = 823724932. Its totient is φ = 823027392.

The previous prime is 823376143. The next prime is 823376167. The reversal of 823376161 is 161673328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220968225 + 602407936 = 14865^2 + 24544^2 .

It is a cyclic number.

It is not a de Polignac number, because 823376161 - 2¹¹ = 823374113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 823376161.

It is not an unprimeable number, because it can be changed into a prime (823376167) 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 3 ways as a sum of consecutive naturals, for example, 170820 + ... + 175573.

It is an arithmetic number, because the mean of its divisors is an integer number (205931233).

Almost surely, 2^823376161 is an apocalyptic number.

It is an amenable number.

823376161 is a deficient number, since it is larger than the sum of its proper divisors (348771).

823376161 is a wasteful number, since it uses less digits than its factorization.

823376161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348770.

The product of its digits is 36288, while the sum is 37.

The square root of 823376161 is about 28694.5319006949. The cubic root of 823376161 is about 937.2729779421.

The spelling of 823376161 in words is "eight hundred twenty-three million, three hundred seventy-six thousand, one hundred sixty-one".