17099111989 has 4 divisors (see below), whose sum is σ = 18104942124. Its totient is φ = 16093281856.

The previous prime is 17099111987. The next prime is 17099111993. The reversal of 17099111989 is 98911199071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5747914225 + 11351197764 = 75815^2 + 106542^2 .

It is a cyclic number.

It is not a de Polignac number, because 17099111989 - 2¹ = 17099111987 is a prime.

It is a super-2 number, since 2×17099111989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17099111987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502915042 + ... + 502915075.

It is an arithmetic number, because the mean of its divisors is an integer number (4526235531).

Almost surely, 2^17099111989 is an apocalyptic number.

It is an amenable number.

17099111989 is a deficient number, since it is larger than the sum of its proper divisors (1005830135).

17099111989 is a wasteful number, since it uses less digits than its factorization.

17099111989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005830134.

The product of its (nonzero) digits is 367416, while the sum is 55.

The spelling of 17099111989 in words is "seventeen billion, ninety-nine million, one hundred eleven thousand, nine hundred eighty-nine".