243638942 has 4 divisors (see below), whose sum is σ = 365458416. Its totient is φ = 121819470.

The previous prime is 243638921. The next prime is 243638963. The reversal of 243638942 is 249836342.

It is a happy number.

243638942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (243638921) and next prime (243638963).

It is a self number, because there is not a number n which added to its sum of digits gives 243638942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60909734 + ... + 60909737.

It is an arithmetic number, because the mean of its divisors is an integer number (91364604).

Almost surely, 2^243638942 is an apocalyptic number.

243638942 is a deficient number, since it is larger than the sum of its proper divisors (121819474).

243638942 is a wasteful number, since it uses less digits than its factorization.

243638942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121819473.

The product of its digits is 248832, while the sum is 41.

The square root of 243638942 is about 15608.9378882741. The cubic root of 243638942 is about 624.5716036029.

The spelling of 243638942 in words is "two hundred forty-three million, six hundred thirty-eight thousand, nine hundred forty-two".