243413661 has 16 divisors (see below), whose sum is σ = 329351168. Its totient is φ = 159894000.

The previous prime is 243413659. The next prime is 243413711. The reversal of 243413661 is 166314342.

It is not a de Polignac number, because 243413661 - 2¹ = 243413659 is a prime.

It is a super-2 number, since 2×243413661² = 118500420722845842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243413641) by changing a digit.

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, 55416 + ... + 59646.

It is an arithmetic number, because the mean of its divisors is an integer number (20584448).

Almost surely, 2^243413661 is an apocalyptic number.

It is an amenable number.

243413661 is a deficient number, since it is larger than the sum of its proper divisors (85937507).

243413661 is a wasteful number, since it uses less digits than its factorization.

243413661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512.

The product of its digits is 10368, while the sum is 30.

The square root of 243413661 is about 15601.7198090467. The cubic root of 243413661 is about 624.3790406462.

The spelling of 243413661 in words is "two hundred forty-three million, four hundred thirteen thousand, six hundred sixty-one".