243734949901 has 2 divisors, whose sum is σ = 243734949902. Its totient is φ = 243734949900.

The previous prime is 243734949877. The next prime is 243734949919. The reversal of 243734949901 is 109949437342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234571674276 + 9163275625 = 484326^2 + 95725^2 .

It is a cyclic number.

It is not a de Polignac number, because 243734949901 - 2¹⁵ = 243734917133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243734949401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121867474950 + 121867474951.

It is an arithmetic number, because the mean of its divisors is an integer number (121867474951).

Almost surely, 2^243734949901 is an apocalyptic number.

It is an amenable number.

243734949901 is a deficient number, since it is larger than the sum of its proper divisors (1).

243734949901 is an equidigital number, since it uses as much as digits as its factorization.

243734949901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 55.

The spelling of 243734949901 in words is "two hundred forty-three billion, seven hundred thirty-four million, nine hundred forty-nine thousand, nine hundred one".