13887497 has 8 divisors (see below), whose sum is σ = 15007944. Its totient is φ = 12774528.

The previous prime is 13887493. The next prime is 13887539. The reversal of 13887497 is 79478831.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 13697401 = 436^2 + 3701^2 .

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

It is not a de Polignac number, because 13887497 - 2² = 13887493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13887493) 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, 2363 + ... + 5775.

It is an arithmetic number, because the mean of its divisors is an integer number (1875993).

Almost surely, 2^13887497 is an apocalyptic number.

It is an amenable number.

13887497 is a deficient number, since it is larger than the sum of its proper divisors (1120447).

13887497 is a wasteful number, since it uses less digits than its factorization.

13887497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739.

The product of its digits is 338688, while the sum is 47.

The square root of 13887497 is about 3726.5932163304. The cubic root of 13887497 is about 240.3668983117.

The spelling of 13887497 in words is "thirteen million, eight hundred eighty-seven thousand, four hundred ninety-seven".