243849447 has 20 divisors (see below), whose sum is σ = 366699696. Its totient is φ = 161481600.

The previous prime is 243849433. The next prime is 243849457. The reversal of 243849447 is 744948342.

It is not a de Polignac number, because 243849447 - 2⁶ = 243849383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243849407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2263 + ... + 22199.

Almost surely, 2^243849447 is an apocalyptic number.

243849447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

243849447 is a deficient number, since it is larger than the sum of its proper divisors (122850249).

243849447 is a wasteful number, since it uses less digits than its factorization.

243849447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100 (or 20091 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 243849447 is about 15615.6795241193. The cubic root of 243849447 is about 624.7514292599.

The spelling of 243849447 in words is "two hundred forty-three million, eight hundred forty-nine thousand, four hundred forty-seven".