13191688 has 16 divisors (see below), whose sum is σ = 25033680. Its totient is φ = 6516048.

The previous prime is 13191679. The next prime is 13191691. The reversal of 13191688 is 88619131.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9270 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (1564605).

Almost surely, 2^13191688 is an apocalyptic number.

It is an amenable number.

13191688 is a deficient number, since it is larger than the sum of its proper divisors (11841992).

13191688 is a wasteful number, since it uses less digits than its factorization.

13191688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956 (or 19952 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 13191688 is about 3632.0363434305. The cubic root of 13191688 is about 236.2835335881.

It can be divided in two parts, 131 and 91688, that added together give a palindrome (91819).

The spelling of 13191688 in words is "thirteen million, one hundred ninety-one thousand, six hundred eighty-eight".