13791688 has 8 divisors (see below), whose sum is σ = 25859430. Its totient is φ = 6895840.

The previous prime is 13791667. The next prime is 13791689. The reversal of 13791688 is 88619731.

It can be written as a sum of positive squares in only one way, i.e., 12096484 + 1695204 = 3478^2 + 1302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13791689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861973 + ... + 861988.

Almost surely, 2^13791688 is an apocalyptic number.

It is an amenable number.

13791688 is a deficient number, since it is larger than the sum of its proper divisors (12067742).

13791688 is a wasteful number, since it uses less digits than its factorization.

13791688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723967 (or 1723963 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 13791688 is about 3713.7161980959. The cubic root of 13791688 is about 239.8128633800.

The spelling of 13791688 in words is "thirteen million, seven hundred ninety-one thousand, six hundred eighty-eight".