169638423 has 4 divisors (see below), whose sum is σ = 226184568. Its totient is φ = 113092280.

The previous prime is 169638373. The next prime is 169638431. The reversal of 169638423 is 324836961.

169638423 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 169638423 - 2⁸ = 169638167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169638323) 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, 28273068 + ... + 28273073.

It is an arithmetic number, because the mean of its divisors is an integer number (56546142).

Almost surely, 2^169638423 is an apocalyptic number.

169638423 is a deficient number, since it is larger than the sum of its proper divisors (56546145).

169638423 is an equidigital number, since it uses as much as digits as its factorization.

169638423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56546144.

The product of its digits is 186624, while the sum is 42.

The square root of 169638423 is about 13024.5315846675. The cubic root of 169638423 is about 553.5727992482.

The spelling of 169638423 in words is "one hundred sixty-nine million, six hundred thirty-eight thousand, four hundred twenty-three".