1890897259813 has 2 divisors, whose sum is σ = 1890897259814. Its totient is φ = 1890897259812.

The previous prime is 1890897259807. The next prime is 1890897259819. The reversal of 1890897259813 is 3189527980981.

It is a balanced prime because it is at equal distance from previous prime (1890897259807) and next prime (1890897259819).

It can be written as a sum of positive squares in only one way, i.e., 1159944078049 + 730953181764 = 1077007^2 + 854958^2 .

It is an emirp because it is prime and its reverse (3189527980981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890897259813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890897259819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945448629906 + 945448629907.

It is an arithmetic number, because the mean of its divisors is an integer number (945448629907).

Almost surely, 2^{1890897259813} is an apocalyptic number.

It is an amenable number.

1890897259813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890897259813 is an equidigital number, since it uses as much as digits as its factorization.

1890897259813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 70.

The spelling of 1890897259813 in words is "one trillion, eight hundred ninety billion, eight hundred ninety-seven million, two hundred fifty-nine thousand, eight hundred thirteen".