19129689 has 16 divisors (see below), whose sum is σ = 28693440. Its totient is φ = 12751668.

The previous prime is 19129681. The next prime is 19129699. The reversal of 19129689 is 98692191.

It is not a de Polignac number, because 19129689 - 2³ = 19129681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19129681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2187 + ... + 6560.

It is an arithmetic number, because the mean of its divisors is an integer number (1793340).

Almost surely, 2^19129689 is an apocalyptic number.

It is an amenable number.

19129689 is a deficient number, since it is larger than the sum of its proper divisors (9563751).

19129689 is an frugal number, since it uses more digits than its factorization.

19129689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768 (or 8750 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19129689 is about 4373.7499928551. The cubic root of 19129689 is about 267.4459156386.

The spelling of 19129689 in words is "nineteen million, one hundred twenty-nine thousand, six hundred eighty-nine".