243950769 has 6 divisors (see below), whose sum is σ = 352373346. Its totient is φ = 162633840.

The previous prime is 243950737. The next prime is 243950783. The reversal of 243950769 is 967059342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 243734544 + 216225 = 15612^2 + 465^2 .

It is not a de Polignac number, because 243950769 - 2⁵ = 243950737 is a prime.

It is a super-2 number, since 2×243950769² = 119023955391382722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243950789) 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 5 ways as a sum of consecutive naturals, for example, 13552812 + ... + 13552829.

It is an arithmetic number, because the mean of its divisors is an integer number (58728891).

Almost surely, 2^243950769 is an apocalyptic number.

It is an amenable number.

243950769 is a deficient number, since it is larger than the sum of its proper divisors (108422577).

243950769 is a wasteful number, since it uses less digits than its factorization.

243950769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27105647 (or 27105644 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 243950769 is about 15618.9234264081. The cubic root of 243950769 is about 624.8379475327.

The spelling of 243950769 in words is "two hundred forty-three million, nine hundred fifty thousand, seven hundred sixty-nine".