1000019999989 has 2 divisors, whose sum is σ = 1000019999990. Its totient is φ = 1000019999988.

The previous prime is 1000019999941. The next prime is 1000020000013. The reversal of 1000019999989 is 9899999100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 673359742225 + 326660257764 = 820585^2 + 571542^2 .

It is an emirp because it is prime and its reverse (9899999100001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000019999989 - 2³⁷ = 862581046517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000019999989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000019999389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500009999994 + 500009999995.

It is an arithmetic number, because the mean of its divisors is an integer number (500009999995).

Almost surely, 2^{1000019999989} is an apocalyptic number.

It is an amenable number.

1000019999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000019999989 is an equidigital number, since it uses as much as digits as its factorization.

1000019999989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4251528, while the sum is 64.

The spelling of 1000019999989 in words is "one trillion, nineteen million, nine hundred ninety-nine thousand, nine hundred eighty-nine".