243959135 has 16 divisors (see below), whose sum is σ = 335102016. Its totient is φ = 167021568.

The previous prime is 243959117. The next prime is 243959153. The reversal of 243959135 is 531959342.

It is an interprime number because it is at equal distance from previous prime (243959117) and next prime (243959153).

It is not a de Polignac number, because 243959135 - 2¹⁰ = 243958111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243959092 and 243959101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18377 + ... + 28733.

It is an arithmetic number, because the mean of its divisors is an integer number (20943876).

Almost surely, 2^243959135 is an apocalyptic number.

243959135 is a deficient number, since it is larger than the sum of its proper divisors (91142881).

243959135 is a wasteful number, since it uses less digits than its factorization.

243959135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042.

The product of its digits is 145800, while the sum is 41.

The square root of 243959135 is about 15619.1912402659. The cubic root of 243959135 is about 624.8450901412.

The spelling of 243959135 in words is "two hundred forty-three million, nine hundred fifty-nine thousand, one hundred thirty-five".