423722879 has 4 divisors (see below), whose sum is σ = 429527376. Its totient is φ = 417918384.

The previous prime is 423722867. The next prime is 423722881. The reversal of 423722879 is 978227324.

It is a happy number.

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 423722879 - 2⁸ = 423722623 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 (423722809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902139 + ... + 2902284.

It is an arithmetic number, because the mean of its divisors is an integer number (107381844).

Almost surely, 2^423722879 is an apocalyptic number.

423722879 is a deficient number, since it is larger than the sum of its proper divisors (5804497).

423722879 is an equidigital number, since it uses as much as digits as its factorization.

423722879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5804496.

The product of its digits is 338688, while the sum is 44.

The square root of 423722879 is about 20584.5300893657. The cubic root of 423722879 is about 751.0934444716.

The spelling of 423722879 in words is "four hundred twenty-three million, seven hundred twenty-two thousand, eight hundred seventy-nine".