243438669 has 16 divisors (see below), whose sum is σ = 364371840. Its totient is φ = 160617600.

The previous prime is 243438667. The next prime is 243438677. The reversal of 243438669 is 966834342.

It is not a de Polignac number, because 243438669 - 2¹ = 243438667 is a prime.

It is a super-2 number, since 2×243438669² = 118524771128983122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243438667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43857 + ... + 49094.

It is an arithmetic number, because the mean of its divisors is an integer number (22773240).

Almost surely, 2^243438669 is an apocalyptic number.

It is an amenable number.

243438669 is a deficient number, since it is larger than the sum of its proper divisors (120933171).

243438669 is an equidigital number, since it uses as much as digits as its factorization.

243438669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93057 (or 93051 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 243438669 is about 15602.5212385691. The cubic root of 243438669 is about 624.4004225416.

The spelling of 243438669 in words is "two hundred forty-three million, four hundred thirty-eight thousand, six hundred sixty-nine".