13803987 has 8 divisors (see below), whose sum is σ = 18499536. Its totient is φ = 9155552.

The previous prime is 13803961. The next prime is 13803991. The reversal of 13803987 is 78930831.

13803987 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 13803987 - 2⁷ = 13803859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13803917) 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, 11088 + ... + 12269.

It is an arithmetic number, because the mean of its divisors is an integer number (2312442).

Almost surely, 2^13803987 is an apocalyptic number.

13803987 is a deficient number, since it is larger than the sum of its proper divisors (4695549).

13803987 is a wasteful number, since it uses less digits than its factorization.

13803987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23557.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13803987 is about 3715.3717176078. The cubic root of 13803987 is about 239.8841280939.

The spelling of 13803987 in words is "thirteen million, eight hundred three thousand, nine hundred eighty-seven".