13479987 has 16 divisors (see below), whose sum is σ = 19042560. Its totient is φ = 8458272.

The previous prime is 13479979. The next prime is 13480003. The reversal of 13479987 is 78997431.

13479987 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13479987 - 2³ = 13479979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13479187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9178 + ... + 10544.

It is an arithmetic number, because the mean of its divisors is an integer number (1190160).

Almost surely, 2^13479987 is an apocalyptic number.

13479987 is a deficient number, since it is larger than the sum of its proper divisors (5562573).

13479987 is a wasteful number, since it uses less digits than its factorization.

13479987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562.

The product of its digits is 381024, while the sum is 48.

The square root of 13479987 is about 3671.5101797489. The cubic root of 13479987 is about 237.9924379115.

The spelling of 13479987 in words is "thirteen million, four hundred seventy-nine thousand, nine hundred eighty-seven".