243903085 has 16 divisors (see below), whose sum is σ = 299531520. Its totient is φ = 190590400.

The previous prime is 243903083. The next prime is 243903103. The reversal of 243903085 is 580309342.

It is a happy number.

It is not a de Polignac number, because 243903085 - 2¹ = 243903083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243903085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243903083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61410 + ... + 65260.

It is an arithmetic number, because the mean of its divisors is an integer number (18720720).

Almost surely, 2^243903085 is an apocalyptic number.

It is an amenable number.

243903085 is a deficient number, since it is larger than the sum of its proper divisors (55628435).

243903085 is a wasteful number, since it uses less digits than its factorization.

243903085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 243903085 is about 15617.3968701573. The cubic root of 243903085 is about 624.7972334243.

The spelling of 243903085 in words is "two hundred forty-three million, nine hundred three thousand, eighty-five".