13297691 has 8 divisors (see below), whose sum is σ = 14723904. Its totient is φ = 11907720.

The previous prime is 13297681. The next prime is 13297717. The reversal of 13297691 is 19679231.

It is a happy number.

13297691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13297691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13297601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8285 + ... + 9758.

It is an arithmetic number, because the mean of its divisors is an integer number (1840488).

Almost surely, 2^13297691 is an apocalyptic number.

13297691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13297691 is a deficient number, since it is larger than the sum of its proper divisors (1426213).

13297691 is a wasteful number, since it uses less digits than its factorization.

13297691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18121.

The product of its digits is 20412, while the sum is 38.

The square root of 13297691 is about 3646.5999232161. The cubic root of 13297691 is about 236.9147384499.

The spelling of 13297691 in words is "thirteen million, two hundred ninety-seven thousand, six hundred ninety-one".