13966805 has 16 divisors (see below), whose sum is σ = 17875200. Its totient is φ = 10445760.

The previous prime is 13966793. The next prime is 13966807. The reversal of 13966805 is 50866931.

It is not a de Polignac number, because 13966805 - 2¹⁰ = 13965781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13966807) 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, 6575 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^13966805 is an apocalyptic number.

It is an amenable number.

13966805 is a deficient number, since it is larger than the sum of its proper divisors (3908395).

13966805 is a wasteful number, since it uses less digits than its factorization.

13966805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 13966805 is about 3737.2188857491. The cubic root of 13966805 is about 240.8235883505.

It can be divided in two parts, 139 and 66805, that multiplied together give a triangular number (9285895 = T₄₃₀₉).

The spelling of 13966805 in words is "thirteen million, nine hundred sixty-six thousand, eight hundred five".