243769 has 2 divisors, whose sum is σ = 243770. Its totient is φ = 243768.

The previous prime is 243709. The next prime is 243781. The reversal of 243769 is 967342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238144 + 5625 = 488^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 243769 - 2¹³ = 235577 is a prime.

It is a super-2 number, since 2×243769² = 118846650722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁸ + 7³ + 3⁴ + 6⁶ + 9² .

It is a self number, because there is not a number n which added to its sum of digits gives 243769.

It is not a weakly prime, because it can be changed into another prime (243709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121884 + 121885.

It is an arithmetic number, because the mean of its divisors is an integer number (121885).

2²⁴³⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

243769 is a deficient number, since it is larger than the sum of its proper divisors (1).

243769 is an equidigital number, since it uses as much as digits as its factorization.

243769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 243769 is about 493.7296831263. The cubic root of 243769 is about 62.4682718960.

The spelling of 243769 in words is "two hundred forty-three thousand, seven hundred sixty-nine".