243994107 has 16 divisors (see below), whose sum is σ = 376509440. Its totient is φ = 137659392.

The previous prime is 243994073. The next prime is 243994109. The reversal of 243994107 is 701499342.

It is not a de Polignac number, because 243994107 - 2⁶ = 243994043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243994109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71878 + ... + 75195.

It is an arithmetic number, because the mean of its divisors is an integer number (23531840).

Almost surely, 2^243994107 is an apocalyptic number.

243994107 is a deficient number, since it is larger than the sum of its proper divisors (132515333).

243994107 is a wasteful number, since it uses less digits than its factorization.

243994107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147162.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 243994107 is about 15620.3107203410. The cubic root of 243994107 is about 624.8749462868.

The spelling of 243994107 in words is "two hundred forty-three million, nine hundred ninety-four thousand, one hundred seven".