163956823 has 4 divisors (see below), whose sum is σ = 173601360. Its totient is φ = 154312288.

The previous prime is 163956817. The next prime is 163956841. The reversal of 163956823 is 328659361.

163956823 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.

It is a cyclic number.

It is not a de Polignac number, because 163956823 - 2⁹ = 163956311 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 163956823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163956803) 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, 4822243 + ... + 4822276.

It is an arithmetic number, because the mean of its divisors is an integer number (43400340).

Almost surely, 2^163956823 is an apocalyptic number.

163956823 is a deficient number, since it is larger than the sum of its proper divisors (9644537).

163956823 is an equidigital number, since it uses as much as digits as its factorization.

163956823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9644536.

The product of its digits is 233280, while the sum is 43.

The square root of 163956823 is about 12804.5625852662. The cubic root of 163956823 is about 547.3223270637.

The spelling of 163956823 in words is "one hundred sixty-three million, nine hundred fifty-six thousand, eight hundred twenty-three".