243245511893 has 2 divisors, whose sum is σ = 243245511894. Its totient is φ = 243245511892.

The previous prime is 243245511877. The next prime is 243245511907. The reversal of 243245511893 is 398115542342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127922106244 + 115323405649 = 357662^2 + 339593^2 .

It is a cyclic number.

It is not a de Polignac number, because 243245511893 - 2⁴ = 243245511877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243245571893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121622755946 + 121622755947.

It is an arithmetic number, because the mean of its divisors is an integer number (121622755947).

Almost surely, 2^243245511893 is an apocalyptic number.

It is an amenable number.

243245511893 is a deficient number, since it is larger than the sum of its proper divisors (1).

243245511893 is an equidigital number, since it uses as much as digits as its factorization.

243245511893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The spelling of 243245511893 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred eleven thousand, eight hundred ninety-three".