13987513 has 8 divisors (see below), whose sum is σ = 14385888. Its totient is φ = 13592544.

The previous prime is 13987489. The next prime is 13987531. The reversal of 13987513 is 31578931.

It is a happy number.

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 13987513 - 2¹⁷ = 13856441 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, 9045 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (1798236).

Almost surely, 2^13987513 is an apocalyptic number.

It is an amenable number.

13987513 is a deficient number, since it is larger than the sum of its proper divisors (398375).

13987513 is a wasteful number, since it uses less digits than its factorization.

13987513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its digits is 22680, while the sum is 37.

The square root of 13987513 is about 3739.9883689659. The cubic root of 13987513 is about 240.9425492781.

It can be divided in two parts, 1398 and 7513, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 13987513 in words is "thirteen million, nine hundred eighty-seven thousand, five hundred thirteen".