17689907149 has 4 divisors (see below), whose sum is σ = 18023679036. Its totient is φ = 17356135264.

The previous prime is 17689907111. The next prime is 17689907189. The reversal of 17689907149 is 94170998671.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94170998671 = 79609 ⋅1182919.

It can be written as a sum of positive squares in 2 ways, for example, as 10582236900 + 7107670249 = 102870^2 + 84307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17689907149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17689907189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166885864 + ... + 166885969.

It is an arithmetic number, because the mean of its divisors is an integer number (4505919759).

Almost surely, 2^17689907149 is an apocalyptic number.

It is an amenable number.

17689907149 is a deficient number, since it is larger than the sum of its proper divisors (333771887).

17689907149 is an equidigital number, since it uses as much as digits as its factorization.

17689907149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333771886.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 17689907149 in words is "seventeen billion, six hundred eighty-nine million, nine hundred seven thousand, one hundred forty-nine".