13691534 has 4 divisors (see below), whose sum is σ = 20537304. Its totient is φ = 6845766.

The previous prime is 13691527. The next prime is 13691537. The reversal of 13691534 is 43519631.

13691534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13691534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13691537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422882 + ... + 3422885.

It is an arithmetic number, because the mean of its divisors is an integer number (5134326).

Almost surely, 2^13691534 is an apocalyptic number.

13691534 is a deficient number, since it is larger than the sum of its proper divisors (6845770).

13691534 is an equidigital number, since it uses as much as digits as its factorization.

13691534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845769.

The product of its digits is 9720, while the sum is 32.

The square root of 13691534 is about 3700.2072914906. The cubic root of 13691534 is about 239.2309526766.

The spelling of 13691534 in words is "thirteen million, six hundred ninety-one thousand, five hundred thirty-four".