243837139 has 16 divisors (see below), whose sum is σ = 301443520. Its totient is φ = 192067200.

The previous prime is 243837109. The next prime is 243837157. The reversal of 243837139 is 931738342.

It is not a de Polignac number, because 243837139 - 2⁵ = 243837107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243837109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14989 + ... + 26689.

It is an arithmetic number, because the mean of its divisors is an integer number (18840220).

Almost surely, 2^243837139 is an apocalyptic number.

243837139 is a deficient number, since it is larger than the sum of its proper divisors (57606381).

243837139 is a wasteful number, since it uses less digits than its factorization.

243837139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11950.

The product of its digits is 108864, while the sum is 40.

The square root of 243837139 is about 15615.2854280669. The cubic root of 243837139 is about 624.7409178972.

The spelling of 243837139 in words is "two hundred forty-three million, eight hundred thirty-seven thousand, one hundred thirty-nine".