13691545 has 16 divisors (see below), whose sum is σ = 19882368. Its totient is φ = 8835840.

The previous prime is 13691537. The next prime is 13691549. The reversal of 13691545 is 54519631.

13691545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13691545 - 2³ = 13691537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13691545.

It is not an unprimeable number, because it can be changed into a prime (13691549) 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, 10911 + ... + 12100.

It is an arithmetic number, because the mean of its divisors is an integer number (1242648).

Almost surely, 2^13691545 is an apocalyptic number.

It is an amenable number.

13691545 is a deficient number, since it is larger than the sum of its proper divisors (6190823).

13691545 is a wasteful number, since it uses less digits than its factorization.

13691545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23040.

The product of its digits is 16200, while the sum is 34.

The square root of 13691545 is about 3700.2087778935. The cubic root of 13691545 is about 239.2310167439.

The spelling of 13691545 in words is "thirteen million, six hundred ninety-one thousand, five hundred forty-five".