243933257629 has 2 divisors, whose sum is σ = 243933257630. Its totient is φ = 243933257628.

The previous prime is 243933257627. The next prime is 243933257663. The reversal of 243933257629 is 926752339342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194772168900 + 49161088729 = 441330^2 + 221723^2 .

It is a cyclic number.

It is not a de Polignac number, because 243933257629 - 2¹ = 243933257627 is a prime.

Together with 243933257627, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 243933257629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243933257627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121966628814 + 121966628815.

It is an arithmetic number, because the mean of its divisors is an integer number (121966628815).

Almost surely, 2^243933257629 is an apocalyptic number.

It is an amenable number.

243933257629 is a deficient number, since it is larger than the sum of its proper divisors (1).

243933257629 is an equidigital number, since it uses as much as digits as its factorization.

243933257629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 55.

The spelling of 243933257629 in words is "two hundred forty-three billion, nine hundred thirty-three million, two hundred fifty-seven thousand, six hundred twenty-nine".