19485439 has 4 divisors (see below), whose sum is σ = 20332656. Its totient is φ = 18638224.

The previous prime is 19485377. The next prime is 19485463. The reversal of 19485439 is 93458491.

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: 93458491 = 7 ⋅13351213.

It is a cyclic number.

It is not a de Polignac number, because 19485439 - 2¹¹ = 19483391 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 19485395 and 19485404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19485239) 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, 423574 + ... + 423619.

It is an arithmetic number, because the mean of its divisors is an integer number (5083164).

Almost surely, 2^19485439 is an apocalyptic number.

19485439 is a deficient number, since it is larger than the sum of its proper divisors (847217).

19485439 is an equidigital number, since it uses as much as digits as its factorization.

19485439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847216.

The product of its digits is 155520, while the sum is 43.

The square root of 19485439 is about 4414.2314166795. The cubic root of 19485439 is about 269.0936182305.

The spelling of 19485439 in words is "nineteen million, four hundred eighty-five thousand, four hundred thirty-nine".