13907987 has 4 divisors (see below), whose sum is σ = 14043120. Its totient is φ = 13772856.

The previous prime is 13907983. The next prime is 13908001. The reversal of 13907987 is 78970931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13907987 - 2² = 13907983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13907983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67412 + ... + 67617.

It is an arithmetic number, because the mean of its divisors is an integer number (3510780).

Almost surely, 2^13907987 is an apocalyptic number.

13907987 is a deficient number, since it is larger than the sum of its proper divisors (135133).

13907987 is a wasteful number, since it uses less digits than its factorization.

13907987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135132.

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

The square root of 13907987 is about 3729.3413627610. The cubic root of 13907987 is about 240.4850548932.

The spelling of 13907987 in words is "thirteen million, nine hundred seven thousand, nine hundred eighty-seven".