13691506 has 16 divisors (see below), whose sum is σ = 20925216. Its totient is φ = 6717856.

The previous prime is 13691497. The next prime is 13691507. The reversal of 13691506 is 60519631.

13691506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13691507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29085 + ... + 29551.

It is an arithmetic number, because the mean of its divisors is an integer number (1307826).

Almost surely, 2^13691506 is an apocalyptic number.

13691506 is a deficient number, since it is larger than the sum of its proper divisors (7233710).

13691506 is a wasteful number, since it uses less digits than its factorization.

13691506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13691506 is about 3700.2035079168. The cubic root of 13691506 is about 239.2307895960.

The spelling of 13691506 in words is "thirteen million, six hundred ninety-one thousand, five hundred six".