1817243137093 has 2 divisors, whose sum is σ = 1817243137094. Its totient is φ = 1817243137092.

The previous prime is 1817243137013. The next prime is 1817243137211. The reversal of 1817243137093 is 3907313427181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1344073872964 + 473169264129 = 1159342^2 + 687873^2 .

It is a cyclic number.

It is not a de Polignac number, because 1817243137093 - 2²⁹ = 1816706266181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1817243137013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908621568546 + 908621568547.

It is an arithmetic number, because the mean of its divisors is an integer number (908621568547).

Almost surely, 2^{1817243137093} is an apocalyptic number.

It is an amenable number.

1817243137093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1817243137093 is an equidigital number, since it uses as much as digits as its factorization.

1817243137093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 1817243137093 in words is "one trillion, eight hundred seventeen billion, two hundred forty-three million, one hundred thirty-seven thousand, ninety-three".