243989342 has 4 divisors (see below), whose sum is σ = 365984016. Its totient is φ = 121994670.

The previous prime is 243989329. The next prime is 243989363.

243989342 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 243989293 and 243989302.

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, 60997334 + ... + 60997337.

It is an arithmetic number, because the mean of its divisors is an integer number (91496004).

Almost surely, 2^243989342 is an apocalyptic number.

243989342 is a deficient number, since it is larger than the sum of its proper divisors (121994674).

243989342 is a wasteful number, since it uses less digits than its factorization.

243989342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121994673.

The product of its digits is 373248, while the sum is 44.

The square root of 243989342 is about 15620.1581938212. The cubic root of 243989342 is about 624.8708784994.

The spelling of 243989342 in words is "two hundred forty-three million, nine hundred eighty-nine thousand, three hundred forty-two".