422639389 has 4 divisors (see below), whose sum is σ = 432468256. Its totient is φ = 412810524.

The previous prime is 422639381. The next prime is 422639411. The reversal of 422639389 is 983936224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422639389 - 2³ = 422639381 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 (422639381) 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, 4914369 + ... + 4914454.

It is an arithmetic number, because the mean of its divisors is an integer number (108117064).

Almost surely, 2^422639389 is an apocalyptic number.

It is an amenable number.

422639389 is a deficient number, since it is larger than the sum of its proper divisors (9828867).

422639389 is an equidigital number, since it uses as much as digits as its factorization.

422639389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9828866.

The product of its digits is 559872, while the sum is 46.

The square root of 422639389 is about 20558.1951785657. The cubic root of 422639389 is about 750.4526979570.

The spelling of 422639389 in words is "four hundred twenty-two million, six hundred thirty-nine thousand, three hundred eighty-nine".