19117489 has 4 divisors (see below), whose sum is σ = 19133424. Its totient is φ = 19101556.

The previous prime is 19117463. The next prime is 19117513. The reversal of 19117489 is 98471191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19117489 - 2⁵ = 19117457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19117429) 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 3 ways as a sum of consecutive naturals, for example, 6007 + ... + 8620.

It is an arithmetic number, because the mean of its divisors is an integer number (4783356).

Almost surely, 2^19117489 is an apocalyptic number.

It is an amenable number.

19117489 is a deficient number, since it is larger than the sum of its proper divisors (15935).

19117489 is a wasteful number, since it uses less digits than its factorization.

19117489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15934.

The product of its digits is 18144, while the sum is 40.

The square root of 19117489 is about 4372.3550862207. The cubic root of 19117489 is about 267.3890488134.

The spelling of 19117489 in words is "nineteen million, one hundred seventeen thousand, four hundred eighty-nine".