243105669 has 6 divisors (see below), whose sum is σ = 351152646. Its totient is φ = 162070440.

The previous prime is 243105659. The next prime is 243105671. The reversal of 243105669 is 966501342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 242892225 + 213444 = 15585^2 + 462^2 .

It is not a de Polignac number, because 243105669 - 2²³ = 234717061 is a prime.

It is a super-2 number, since 2×243105669² = 118200732599875122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243105619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13505862 + ... + 13505879.

It is an arithmetic number, because the mean of its divisors is an integer number (58525441).

Almost surely, 2^243105669 is an apocalyptic number.

It is an amenable number.

243105669 is a deficient number, since it is larger than the sum of its proper divisors (108046977).

243105669 is a wasteful number, since it uses less digits than its factorization.

243105669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27011747 (or 27011744 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 243105669 is about 15591.8462344906. The cubic root of 243105669 is about 624.1155866378.

The spelling of 243105669 in words is "two hundred forty-three million, one hundred five thousand, six hundred sixty-nine".