13691761 has 4 divisors (see below), whose sum is σ = 14412400. Its totient is φ = 12971124.

The previous prime is 13691747. The next prime is 13691767. The reversal of 13691761 is 16719631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16719631 = 29 ⋅576539.

It is a cyclic number.

It is not a de Polignac number, because 13691761 - 2⁵ = 13691729 is a prime.

It is a super-2 number, since 2×13691761² = 374928638562242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13691767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360291 + ... + 360328.

It is an arithmetic number, because the mean of its divisors is an integer number (3603100).

Almost surely, 2^13691761 is an apocalyptic number.

It is an amenable number.

13691761 is a deficient number, since it is larger than the sum of its proper divisors (720639).

13691761 is an equidigital number, since it uses as much as digits as its factorization.

13691761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720638.

The product of its digits is 6804, while the sum is 34.

The square root of 13691761 is about 3700.2379653206. The cubic root of 13691761 is about 239.2322747862.

The spelling of 13691761 in words is "thirteen million, six hundred ninety-one thousand, seven hundred sixty-one".