243934157 has 2 divisors, whose sum is σ = 243934158. Its totient is φ = 243934156.

The previous prime is 243934153. The next prime is 243934169. The reversal of 243934157 is 751439342.

243934157 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., 233050756 + 10883401 = 15266^2 + 3299^2 .

It is a cyclic number.

It is not a de Polignac number, because 243934157 - 2² = 243934153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243934157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243934153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121967078 + 121967079.

It is an arithmetic number, because the mean of its divisors is an integer number (121967079).

Almost surely, 2^243934157 is an apocalyptic number.

It is an amenable number.

243934157 is a deficient number, since it is larger than the sum of its proper divisors (1).

243934157 is an equidigital number, since it uses as much as digits as its factorization.

243934157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 243934157 is about 15618.3916265408. The cubic root of 243934157 is about 624.8237642836.

The spelling of 243934157 in words is "two hundred forty-three million, nine hundred thirty-four thousand, one hundred fifty-seven".