169442423 has 4 divisors (see below), whose sum is σ = 171829008. Its totient is φ = 167055840.

The previous prime is 169442419. The next prime is 169442443. The reversal of 169442423 is 324244961.

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 169442423 - 2² = 169442419 is a prime.

It is a super-2 number, since 2×169442423² = 57421469424221858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169442443) 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, 1193186 + ... + 1193327.

It is an arithmetic number, because the mean of its divisors is an integer number (42957252).

Almost surely, 2^169442423 is an apocalyptic number.

169442423 is a deficient number, since it is larger than the sum of its proper divisors (2386585).

169442423 is an equidigital number, since it uses as much as digits as its factorization.

169442423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386584.

The product of its digits is 41472, while the sum is 35.

The square root of 169442423 is about 13017.0051471143. The cubic root of 169442423 is about 553.3595180025.

The spelling of 169442423 in words is "one hundred sixty-nine million, four hundred forty-two thousand, four hundred twenty-three".