423323989 has 4 divisors (see below), whose sum is σ = 461808000. Its totient is φ = 384839980.

The previous prime is 423323981. The next prime is 423324037. The reversal of 423323989 is 989323324.

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 423323989 - 2³ = 423323981 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 (423323981) 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, 19241989 + ... + 19242010.

It is an arithmetic number, because the mean of its divisors is an integer number (115452000).

Almost surely, 2^423323989 is an apocalyptic number.

It is an amenable number.

423323989 is a deficient number, since it is larger than the sum of its proper divisors (38484011).

423323989 is a wasteful number, since it uses less digits than its factorization.

423323989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38484010.

The product of its digits is 279936, while the sum is 43.

The square root of 423323989 is about 20574.8387356985. The cubic root of 423323989 is about 750.8576789567.

The spelling of 423323989 in words is "four hundred twenty-three million, three hundred twenty-three thousand, nine hundred eighty-nine".