19485689 has 4 divisors (see below), whose sum is σ = 20631924. Its totient is φ = 18339456.

The previous prime is 19485679. The next prime is 19485703. The reversal of 19485689 is 98658491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98658491 = 233 ⋅423427.

It can be written as a sum of positive squares in 2 ways, for example, as 16000000 + 3485689 = 4000^2 + 1867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19485689 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (19485679) 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, 573092 + ... + 573125.

It is an arithmetic number, because the mean of its divisors is an integer number (5157981).

Almost surely, 2^19485689 is an apocalyptic number.

It is an amenable number.

19485689 is a deficient number, since it is larger than the sum of its proper divisors (1146235).

19485689 is a wasteful number, since it uses less digits than its factorization.

19485689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146234.

The product of its digits is 622080, while the sum is 50.

The square root of 19485689 is about 4414.2597340891. The cubic root of 19485689 is about 269.0947690576.

The spelling of 19485689 in words is "nineteen million, four hundred eighty-five thousand, six hundred eighty-nine".