13487287 has 4 divisors (see below), whose sum is σ = 14713416. Its totient is φ = 12261160.

The previous prime is 13487267. The next prime is 13487293. The reversal of 13487287 is 78278431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13487287 - 2²³ = 5098679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487267) 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, 613048 + ... + 613069.

It is an arithmetic number, because the mean of its divisors is an integer number (3678354).

Almost surely, 2^13487287 is an apocalyptic number.

13487287 is a deficient number, since it is larger than the sum of its proper divisors (1226129).

13487287 is a wasteful number, since it uses less digits than its factorization.

13487287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226128.

The product of its digits is 75264, while the sum is 40.

The square root of 13487287 is about 3672.5041865191. The cubic root of 13487287 is about 238.0353912485.

The spelling of 13487287 in words is "thirteen million, four hundred eighty-seven thousand, two hundred eighty-seven".