243849405 has 8 divisors (see below), whose sum is σ = 390159072. Its totient is φ = 130053008.

The previous prime is 243849383. The next prime is 243849407. The reversal of 243849405 is 504948342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243849405 - 2⁶ = 243849341 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 7 ways as a sum of consecutive naturals, for example, 8128299 + ... + 8128328.

It is an arithmetic number, because the mean of its divisors is an integer number (48769884).

Almost surely, 2^243849405 is an apocalyptic number.

It is an amenable number.

243849405 is a deficient number, since it is larger than the sum of its proper divisors (146309667).

243849405 is a wasteful number, since it uses less digits than its factorization.

243849405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16256635.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 243849405 is about 15615.6781793171. The cubic root of 243849405 is about 624.7513933914.

The spelling of 243849405 in words is "two hundred forty-three million, eight hundred forty-nine thousand, four hundred five".