19007309689 has 3 divisors (see below), whose sum is σ = 19007447557. Its totient is φ = 19007171822.

The previous prime is 19007309683. The next prime is 19007309729. The reversal of 19007309689 is 98690370091.

The square root of 19007309689 is 137867.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 19007309689 - 2²⁵ = 18973755257 is a prime.

It is a super-2 number, since 2×19007309689² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19007309683) 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 2 ways as a sum of consecutive naturals, for example, 68934 + ... + 206800.

Almost surely, 2^19007309689 is an apocalyptic number.

19007309689 is the 137867-th square number.

19007309689 is the 68934-th centered octagonal number.

It is an amenable number.

19007309689 is a deficient number, since it is larger than the sum of its proper divisors (137868).

19007309689 is an frugal number, since it uses more digits than its factorization.

19007309689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275734 (or 137867 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 19007309689 in words is "nineteen billion, seven million, three hundred nine thousand, six hundred eighty-nine".