13987463 has 4 divisors (see below), whose sum is σ = 15985680. Its totient is φ = 11989248.

The previous prime is 13987459. The next prime is 13987487. The reversal of 13987463 is 36478931.

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 13987463 - 2² = 13987459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13987463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987403) 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, 999098 + ... + 999111.

It is an arithmetic number, because the mean of its divisors is an integer number (3996420).

Almost surely, 2^13987463 is an apocalyptic number.

13987463 is a deficient number, since it is larger than the sum of its proper divisors (1998217).

13987463 is an equidigital number, since it uses as much as digits as its factorization.

13987463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998216.

The product of its digits is 108864, while the sum is 41.

The square root of 13987463 is about 3739.9816844471. The cubic root of 13987463 is about 240.9422621853.

The spelling of 13987463 in words is "thirteen million, nine hundred eighty-seven thousand, four hundred sixty-three".