243794429 has 2 divisors, whose sum is σ = 243794430. Its totient is φ = 243794428.

The previous prime is 243794423. The next prime is 243794479. The reversal of 243794429 is 924497342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234028804 + 9765625 = 15298^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 243794429 - 2⁴ = 243794413 is a prime.

It is a super-2 number, since 2×243794429² = 118871447222872082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243794429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243794423) 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 as a sum of consecutive naturals, namely, 121897214 + 121897215.

It is an arithmetic number, because the mean of its divisors is an integer number (121897215).

Almost surely, 2^243794429 is an apocalyptic number.

It is an amenable number.

243794429 is a deficient number, since it is larger than the sum of its proper divisors (1).

243794429 is an equidigital number, since it uses as much as digits as its factorization.

243794429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 44.

The square root of 243794429 is about 15613.9177979135. The cubic root of 243794429 is about 624.7044396659.

The spelling of 243794429 in words is "two hundred forty-three million, seven hundred ninety-four thousand, four hundred twenty-nine".