243136849 has 8 divisors (see below), whose sum is σ = 245783808. Its totient is φ = 240497040.

The previous prime is 243136843. The next prime is 243136853. The reversal of 243136849 is 948631342.

It is a happy number.

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 243136849 - 2²⁷ = 108919121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243136843) 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, 92544 + ... + 95134.

It is an arithmetic number, because the mean of its divisors is an integer number (30722976).

Almost surely, 2^243136849 is an apocalyptic number.

It is an amenable number.

243136849 is a deficient number, since it is larger than the sum of its proper divisors (2646959).

243136849 is a wasteful number, since it uses less digits than its factorization.

243136849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 124416, while the sum is 40.

The square root of 243136849 is about 15592.8460840220. The cubic root of 243136849 is about 624.1422678915.

The spelling of 243136849 in words is "two hundred forty-three million, one hundred thirty-six thousand, eight hundred forty-nine".