243139963 has 8 divisors (see below), whose sum is σ = 271713456. Its totient is φ = 215644800.

The previous prime is 243139957. The next prime is 243139999. The reversal of 243139963 is 369931342.

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 243139963 - 2¹⁷ = 243008891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243139063) 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 7 ways as a sum of consecutive naturals, for example, 269106 + ... + 270007.

It is an arithmetic number, because the mean of its divisors is an integer number (33964182).

Almost surely, 2^243139963 is an apocalyptic number.

243139963 is a deficient number, since it is larger than the sum of its proper divisors (28573493).

243139963 is a wasteful number, since it uses less digits than its factorization.

243139963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539165.

The product of its digits is 104976, while the sum is 40.

The square root of 243139963 is about 15592.9459371858. The cubic root of 243139963 is about 624.1449324687.

The spelling of 243139963 in words is "two hundred forty-three million, one hundred thirty-nine thousand, nine hundred sixty-three".