13986805 has 12 divisors (see below), whose sum is σ = 19524780. Its totient is φ = 9590784.

The previous prime is 13986769. The next prime is 13986809. The reversal of 13986805 is 50868931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5466244 + 8520561 = 2338^2 + 2919^2 .

It is not a de Polignac number, because 13986805 - 2⁹ = 13986293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13986809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28300 + ... + 28789.

It is an arithmetic number, because the mean of its divisors is an integer number (1627065).

Almost surely, 2^13986805 is an apocalyptic number.

It is an amenable number.

13986805 is a deficient number, since it is larger than the sum of its proper divisors (5537975).

13986805 is an equidigital number, since it uses as much as digits as its factorization.

13986805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57108 (or 57101 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 13986805 is about 3739.8937150673. The cubic root of 13986805 is about 240.9384839807.

The spelling of 13986805 in words is "thirteen million, nine hundred eighty-six thousand, eight hundred five".