243396589 has 4 divisors (see below), whose sum is σ = 243532800. Its totient is φ = 243260380.

The previous prime is 243396581. The next prime is 243396611. The reversal of 243396589 is 985693342.

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: 985693342 = 2 ⋅492846671.

It is a cyclic number.

It is not a de Polignac number, because 243396589 - 2³ = 243396581 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 (243396581) 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, 65389 + ... + 69010.

It is an arithmetic number, because the mean of its divisors is an integer number (60883200).

Almost surely, 2^243396589 is an apocalyptic number.

It is an amenable number.

243396589 is a deficient number, since it is larger than the sum of its proper divisors (136211).

243396589 is a wasteful number, since it uses less digits than its factorization.

243396589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136210.

The product of its digits is 1399680, while the sum is 49.

The square root of 243396589 is about 15601.1726802827. The cubic root of 243396589 is about 624.3644432072.

The spelling of 243396589 in words is "two hundred forty-three million, three hundred ninety-six thousand, five hundred eighty-nine".