13697191 has 4 divisors (see below), whose sum is σ = 13705384. Its totient is φ = 13689000.

The previous prime is 13697149. The next prime is 13697197. The reversal of 13697191 is 19179631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19179631 = 23 ⋅833897.

It is a 3-Lehmer number, since φ(13697191) divides (13697191-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13697191 is a prime.

It is a super-2 number, since 2×13697191² = 375226082580962, which contains 22 as substring.

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 13697191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13697197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (3426346).

Almost surely, 2^13697191 is an apocalyptic number.

13697191 is the 2341-st heptagonal number.

13697191 is a deficient number, since it is larger than the sum of its proper divisors (8193).

13697191 is an equidigital number, since it uses as much as digits as its factorization.

13697191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8192.

The product of its digits is 10206, while the sum is 37.

The square root of 13697191 is about 3700.9716291806. The cubic root of 13697191 is about 239.2638962254.

The spelling of 13697191 in words is "thirteen million, six hundred ninety-seven thousand, one hundred ninety-one".