13908191 has 8 divisors (see below), whose sum is σ = 15204864. Its totient is φ = 12616920.

The previous prime is 13908149. The next prime is 13908203. The reversal of 13908191 is 19180931.

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

It is a cyclic number.

It is not a de Polignac number, because 13908191 - 2¹⁰ = 13907167 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 (13908131) 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, 5636 + ... + 7718.

It is an arithmetic number, because the mean of its divisors is an integer number (1900608).

Almost surely, 2^13908191 is an apocalyptic number.

13908191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13908191 is a deficient number, since it is larger than the sum of its proper divisors (1296673).

13908191 is a wasteful number, since it uses less digits than its factorization.

13908191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 13908191 is about 3729.3687133347. The cubic root of 13908191 is about 240.4862306854.

The spelling of 13908191 in words is "thirteen million, nine hundred eight thousand, one hundred ninety-one".