13987523 has 8 divisors (see below), whose sum is σ = 15487680. Its totient is φ = 12525480.

The previous prime is 13987489. The next prime is 13987531. The reversal of 13987523 is 32578931.

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

It is not a de Polignac number, because 13987523 - 2⁶ = 13987459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13987573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8753 + ... + 10226.

It is an arithmetic number, because the mean of its divisors is an integer number (1935960).

Almost surely, 2^13987523 is an apocalyptic number.

13987523 is a deficient number, since it is larger than the sum of its proper divisors (1500157).

13987523 is a wasteful number, since it uses less digits than its factorization.

13987523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19057.

The product of its digits is 45360, while the sum is 38.

The square root of 13987523 is about 3739.9897058682. The cubic root of 13987523 is about 240.9426066966.

The spelling of 13987523 in words is "thirteen million, nine hundred eighty-seven thousand, five hundred twenty-three".