422239999 has 4 divisors (see below), whose sum is σ = 447077664. Its totient is φ = 397402336.

The previous prime is 422239997. The next prime is 422240009. The reversal of 422239999 is 999932224.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 422239999 - 2¹ = 422239997 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422239997) 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, 12418807 + ... + 12418840.

It is an arithmetic number, because the mean of its divisors is an integer number (111769416).

Almost surely, 2^422239999 is an apocalyptic number.

422239999 is a deficient number, since it is larger than the sum of its proper divisors (24837665).

422239999 is a wasteful number, since it uses less digits than its factorization.

422239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24837664.

The product of its digits is 629856, while the sum is 49.

The square root of 422239999 is about 20548.4792381334. The cubic root of 422239999 is about 750.2162333552.

The spelling of 422239999 in words is "four hundred twenty-two million, two hundred thirty-nine thousand, nine hundred ninety-nine".