13681191 has 8 divisors (see below), whose sum is σ = 18336880. Its totient is φ = 9073152.

The previous prime is 13681163. The next prime is 13681211. The reversal of 13681191 is 19118631.

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

It is not a de Polignac number, because 13681191 - 2⁹ = 13680679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681091) 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, 11236 + ... + 12393.

It is an arithmetic number, because the mean of its divisors is an integer number (2292110).

Almost surely, 2^13681191 is an apocalyptic number.

13681191 is a deficient number, since it is larger than the sum of its proper divisors (4655689).

13681191 is a wasteful number, since it uses less digits than its factorization.

13681191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23825.

The product of its digits is 1296, while the sum is 30.

The square root of 13681191 is about 3698.8094030377. The cubic root of 13681191 is about 239.1706967288.

The spelling of 13681191 in words is "thirteen million, six hundred eighty-one thousand, one hundred ninety-one".