19489249 has 6 divisors (see below), whose sum is σ = 21103926. Its totient is φ = 17989920.

The previous prime is 19489243. The next prime is 19489291. The reversal of 19489249 is 94298491.

It can be written as a sum of positive squares in 3 ways, for example, as 2117025 + 17372224 = 1455^2 + 4168^2 .

It is not a de Polignac number, because 19489249 - 2¹⁷ = 19358177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19489199 and 19489208.

It is not an unprimeable number, because it can be changed into a prime (19489243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57492 + ... + 57829.

It is an arithmetic number, because the mean of its divisors is an integer number (3517321).

Almost surely, 2^19489249 is an apocalyptic number.

It is an amenable number.

19489249 is a deficient number, since it is larger than the sum of its proper divisors (1614677).

19489249 is a wasteful number, since it uses less digits than its factorization.

19489249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115347 (or 115334 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 19489249 is about 4414.6629542922. The cubic root of 19489249 is about 269.1111557683. Note that the first 4 decimals are identical.

The spelling of 19489249 in words is "nineteen million, four hundred eighty-nine thousand, two hundred forty-nine".