423438789 has 4 divisors (see below), whose sum is σ = 564585056. Its totient is φ = 282292524.

The previous prime is 423438761. The next prime is 423438791. The reversal of 423438789 is 987834324.

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 not a de Polignac number, because 423438789 - 2¹³ = 423430597 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 (423438749) 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, 70573129 + ... + 70573134.

It is an arithmetic number, because the mean of its divisors is an integer number (141146264).

Almost surely, 2^423438789 is an apocalyptic number.

It is an amenable number.

423438789 is a deficient number, since it is larger than the sum of its proper divisors (141146267).

423438789 is a wasteful number, since it uses less digits than its factorization.

423438789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141146266.

The product of its digits is 1161216, while the sum is 48.

The square root of 423438789 is about 20577.6283618885. The cubic root of 423438789 is about 750.9255471246.

The spelling of 423438789 in words is "four hundred twenty-three million, four hundred thirty-eight thousand, seven hundred eighty-nine".