423744169 has 4 divisors (see below), whose sum is σ = 431739396. Its totient is φ = 415748944.

The previous prime is 423744127. The next prime is 423744173. The reversal of 423744169 is 961447324.

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 185967769 + 237776400 = 13637^2 + 15420^2 .

It is a cyclic number.

It is not a de Polignac number, because 423744169 - 2¹⁵ = 423711401 is a prime.

It is a super-2 number, since 2×423744169² = 359118241523001122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423744569) 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, 3997534 + ... + 3997639.

It is an arithmetic number, because the mean of its divisors is an integer number (107934849).

Almost surely, 2^423744169 is an apocalyptic number.

It is an amenable number.

423744169 is a deficient number, since it is larger than the sum of its proper divisors (7995227).

423744169 is an equidigital number, since it uses as much as digits as its factorization.

423744169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995226.

The product of its digits is 145152, while the sum is 40.

The square root of 423744169 is about 20585.0472187945. The cubic root of 423744169 is about 751.1060238503.

The spelling of 423744169 in words is "four hundred twenty-three million, seven hundred forty-four thousand, one hundred sixty-nine".