1890838106593 has 2 divisors, whose sum is σ = 1890838106594. Its totient is φ = 1890838106592.

The previous prime is 1890838106569. The next prime is 1890838106669. The reversal of 1890838106593 is 3956018380981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768825520784 + 122012585809 = 1329972^2 + 349303^2 .

It is an emirp because it is prime and its reverse (3956018380981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890838106593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1890838106293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945419053296 + 945419053297.

It is an arithmetic number, because the mean of its divisors is an integer number (945419053297).

Almost surely, 2^{1890838106593} is an apocalyptic number.

It is an amenable number.

1890838106593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890838106593 is an equidigital number, since it uses as much as digits as its factorization.

1890838106593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 1890838106593 in words is "one trillion, eight hundred ninety billion, eight hundred thirty-eight million, one hundred six thousand, five hundred ninety-three".