243464789 has 4 divisors (see below), whose sum is σ = 243633120. Its totient is φ = 243296460.

The previous prime is 243464779. The next prime is 243464797. The reversal of 243464789 is 987464342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 987464342 = 2 ⋅493732171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243464789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243464719) 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, 81977 + ... + 84894.

It is an arithmetic number, because the mean of its divisors is an integer number (60908280).

Almost surely, 2^243464789 is an apocalyptic number.

It is an amenable number.

243464789 is a deficient number, since it is larger than the sum of its proper divisors (168331).

243464789 is a wasteful number, since it uses less digits than its factorization.

243464789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168330.

The product of its digits is 1161216, while the sum is 47.

The square root of 243464789 is about 15603.3582603233. The cubic root of 243464789 is about 624.4227536361.

The spelling of 243464789 in words is "two hundred forty-three million, four hundred sixty-four thousand, seven hundred eighty-nine".