13907986 has 4 divisors (see below), whose sum is σ = 20861982. Its totient is φ = 6953992.

The previous prime is 13907983. The next prime is 13908001. The reversal of 13907986 is 68970931.

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

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 6095961 = 2795^2 + 2469^2 .

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 as a sum of consecutive naturals, namely, 3476995 + ... + 3476998.

Almost surely, 2^13907986 is an apocalyptic number.

13907986 is a deficient number, since it is larger than the sum of its proper divisors (6953996).

13907986 is an equidigital number, since it uses as much as digits as its factorization.

13907986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6953995.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 13907986 is about 3729.3412286891. The cubic root of 13907986 is about 240.4850491294.

The spelling of 13907986 in words is "thirteen million, nine hundred seven thousand, nine hundred eighty-six".