243986629 has 2 divisors, whose sum is σ = 243986630. Its totient is φ = 243986628.

The previous prime is 243986623. The next prime is 243986683. The reversal of 243986629 is 926689342.

It is a happy number.

243986629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243828225 + 158404 = 15615^2 + 398^2 .

It is a cyclic number.

It is not a de Polignac number, because 243986629 - 2⁹ = 243986117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243986623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121993314 + 121993315.

It is an arithmetic number, because the mean of its divisors is an integer number (121993315).

Almost surely, 2^243986629 is an apocalyptic number.

It is an amenable number.

243986629 is a deficient number, since it is larger than the sum of its proper divisors (1).

243986629 is an equidigital number, since it uses as much as digits as its factorization.

243986629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 243986629 is about 15620.0713506693. The cubic root of 243986629 is about 624.8685624406.

The spelling of 243986629 in words is "two hundred forty-three million, nine hundred eighty-six thousand, six hundred twenty-nine".