163420823 has 8 divisors (see below), whose sum is σ = 168236640. Its totient is φ = 158626080.

The previous prime is 163420811. The next prime is 163420837. The reversal of 163420823 is 328024361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163420823 - 2⁸ = 163420567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163420883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11213 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (21029580).

Almost surely, 2^163420823 is an apocalyptic number.

163420823 is a deficient number, since it is larger than the sum of its proper divisors (4815817).

163420823 is a wasteful number, since it uses less digits than its factorization.

163420823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10537.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 163420823 is about 12783.6154119248. The cubic root of 163420823 is about 546.7252490676.

The spelling of 163420823 in words is "one hundred sixty-three million, four hundred twenty thousand, eight hundred twenty-three".