243704945 has 16 divisors (see below), whose sum is σ = 337799808. Its totient is φ = 166813440.

The previous prime is 243704921. The next prime is 243704969. The reversal of 243704945 is 549407342.

It is an interprime number because it is at equal distance from previous prime (243704921) and next prime (243704969).

It is not a de Polignac number, because 243704945 - 2¹⁰ = 243703921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243704899 and 243704908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129389 + ... + 131258.

It is an arithmetic number, because the mean of its divisors is an integer number (21112488).

Almost surely, 2^243704945 is an apocalyptic number.

It is an amenable number.

243704945 is a deficient number, since it is larger than the sum of its proper divisors (94094863).

243704945 is a wasteful number, since it uses less digits than its factorization.

243704945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260680.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 243704945 is about 15611.0520145184. The cubic root of 243704945 is about 624.6279983609.

The spelling of 243704945 in words is "two hundred forty-three million, seven hundred four thousand, nine hundred forty-five".