13987907 has 8 divisors (see below), whose sum is σ = 14278656. Its totient is φ = 13700232.

The previous prime is 13987903. The next prime is 13987921. The reversal of 13987907 is 70978931.

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 13987907 - 2² = 13987903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13987901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9878 + ... + 11204.

It is an arithmetic number, because the mean of its divisors is an integer number (1784832).

Almost surely, 2^13987907 is an apocalyptic number.

13987907 is a deficient number, since it is larger than the sum of its proper divisors (290749).

13987907 is a wasteful number, since it uses less digits than its factorization.

13987907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 13987907 is about 3740.0410425555. The cubic root of 13987907 is about 240.9448115453.

The spelling of 13987907 in words is "thirteen million, nine hundred eighty-seven thousand, nine hundred seven".