13871489 has 8 divisors (see below), whose sum is σ = 14291592. Its totient is φ = 13455360.

The previous prime is 13871471. The next prime is 13871491. The reversal of 13871489 is 98417831.

It can be written as a sum of positive squares in 4 ways, for example, as 1481089 + 12390400 = 1217^2 + 3520^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13871489 - 2⁸ = 13871233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13871989) 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 7 ways as a sum of consecutive naturals, for example, 7037 + ... + 8789.

It is an arithmetic number, because the mean of its divisors is an integer number (1786449).

Almost surely, 2^13871489 is an apocalyptic number.

It is an amenable number.

13871489 is a deficient number, since it is larger than the sum of its proper divisors (420103).

13871489 is a wasteful number, since it uses less digits than its factorization.

13871489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987.

The product of its digits is 48384, while the sum is 41.

The square root of 13871489 is about 3724.4447908380. Note that the first 3 decimals coincide. The cubic root of 13871489 is about 240.2745065079.

The spelling of 13871489 in words is "thirteen million, eight hundred seventy-one thousand, four hundred eighty-nine".