10209998989 has 2 divisors, whose sum is σ = 10209998990. Its totient is φ = 10209998988.

The previous prime is 10209998879. The next prime is 10209998993. The reversal of 10209998989 is 98989990201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9673706025 + 536292964 = 98355^2 + 23158^2 .

It is a cyclic number.

It is not a de Polignac number, because 10209998989 - 2⁷ = 10209998861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10209998989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10209998089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5104999494 + 5104999495.

It is an arithmetic number, because the mean of its divisors is an integer number (5104999495).

Almost surely, 2^10209998989 is an apocalyptic number.

It is an amenable number.

10209998989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209998989 is an equidigital number, since it uses as much as digits as its factorization.

10209998989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 64.

The spelling of 10209998989 in words is "ten billion, two hundred nine million, nine hundred ninety-eight thousand, nine hundred eighty-nine".