1890897259793 has 2 divisors, whose sum is σ = 1890897259794. Its totient is φ = 1890897259792.

The previous prime is 1890897259709. The next prime is 1890897259807. The reversal of 1890897259793 is 3979527980981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1432157905984 + 458739353809 = 1196728^2 + 677303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890897259793 is a prime.

It is a super-2 number, since 2×1890897259793² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1890897259093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945448629896 + 945448629897.

It is an arithmetic number, because the mean of its divisors is an integer number (945448629897).

Almost surely, 2^{1890897259793} is an apocalyptic number.

It is an amenable number.

1890897259793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890897259793 is an equidigital number, since it uses as much as digits as its factorization.

1890897259793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617258880, while the sum is 77.

The spelling of 1890897259793 in words is "one trillion, eight hundred ninety billion, eight hundred ninety-seven million, two hundred fifty-nine thousand, seven hundred ninety-three".