19145489 has 4 divisors (see below), whose sum is σ = 20886000. Its totient is φ = 17404980.

The previous prime is 19145473. The next prime is 19145501. The reversal of 19145489 is 98454191.

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 19145489 - 2⁴ = 19145473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19145419) 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, 870239 + ... + 870260.

It is an arithmetic number, because the mean of its divisors is an integer number (5221500).

Almost surely, 2^19145489 is an apocalyptic number.

It is an amenable number.

19145489 is a deficient number, since it is larger than the sum of its proper divisors (1740511).

19145489 is a wasteful number, since it uses less digits than its factorization.

19145489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740510.

The product of its digits is 51840, while the sum is 41.

The square root of 19145489 is about 4375.5558504035. Note that the first 3 decimals coincide. The cubic root of 19145489 is about 267.5195269176.

The spelling of 19145489 in words is "nineteen million, one hundred forty-five thousand, four hundred eighty-nine".