10091000090989 has 2 divisors, whose sum is σ = 10091000090990. Its totient is φ = 10091000090988.

The previous prime is 10091000090971. The next prime is 10091000091041. The reversal of 10091000090989 is 98909000019001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10041863832100 + 49136258889 = 3168890^2 + 221667^2 .

It is a cyclic number.

It is not a de Polignac number, because 10091000090989 - 2²¹ = 10090997993837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10091000097989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045500045494 + 5045500045495.

It is an arithmetic number, because the mean of its divisors is an integer number (5045500045495).

Almost surely, 2^{10091000090989} is an apocalyptic number.

It is an amenable number.

10091000090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10091000090989 is an equidigital number, since it uses as much as digits as its factorization.

10091000090989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 10091000090989 in words is "ten trillion, ninety-one billion, ninety thousand, nine hundred eighty-nine".