13987335 has 16 divisors (see below), whose sum is σ = 23353344. Its totient is φ = 7135392.

The previous prime is 13987333. The next prime is 13987339. The reversal of 13987335 is 53378931.

13987335 = 123² + 124² + ... + 352².

It is not a de Polignac number, because 13987335 - 2¹ = 13987333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13987293 and 13987302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19927 + ... + 20616.

It is an arithmetic number, because the mean of its divisors is an integer number (1459584).

Almost surely, 2^13987335 is an apocalyptic number.

13987335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13987335 is a deficient number, since it is larger than the sum of its proper divisors (9366009).

13987335 is a wasteful number, since it uses less digits than its factorization.

13987335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40574.

The product of its digits is 68040, while the sum is 39.

The square root of 13987335 is about 3739.9645720247. The cubic root of 13987335 is about 240.9415272247.

The spelling of 13987335 in words is "thirteen million, nine hundred eighty-seven thousand, three hundred thirty-five".