423785189 has 4 divisors (see below), whose sum is σ = 442210656. Its totient is φ = 405359724.

The previous prime is 423785183. The next prime is 423785203. The reversal of 423785189 is 981587324.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-423785189 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 (423785183) 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, 9212699 + ... + 9212744.

It is an arithmetic number, because the mean of its divisors is an integer number (110552664).

Almost surely, 2^423785189 is an apocalyptic number.

It is an amenable number.

423785189 is a deficient number, since it is larger than the sum of its proper divisors (18425467).

423785189 is a wasteful number, since it uses less digits than its factorization.

423785189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18425466.

The product of its digits is 483840, while the sum is 47.

The square root of 423785189 is about 20586.0435489678. The cubic root of 423785189 is about 751.1302596803.

The spelling of 423785189 in words is "four hundred twenty-three million, seven hundred eighty-five thousand, one hundred eighty-nine".