999997000109 has 2 divisors, whose sum is σ = 999997000110. Its totient is φ = 999997000108.

The previous prime is 999997000103. The next prime is 999997000153. The reversal of 999997000109 is 901000799999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 670561178884 + 329435821225 = 818878^2 + 573965^2 .

It is an emirp because it is prime and its reverse (901000799999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999997000109 - 2⁸ = 999996999853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999997000103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998500054 + 499998500055.

It is an arithmetic number, because the mean of its divisors is an integer number (499998500055).

Almost surely, 2^999997000109 is an apocalyptic number.

It is an amenable number.

999997000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997000109 is an equidigital number, since it uses as much as digits as its factorization.

999997000109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3720087, while the sum is 62.

The spelling of 999997000109 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, one hundred nine", and thus it is an aban number.