13817091 has 8 divisors (see below), whose sum is σ = 18495504. Its totient is φ = 9175040.

The previous prime is 13817081. The next prime is 13817101. The reversal of 13817091 is 19071831.

It is an interprime number because it is at equal distance from previous prime (13817081) and next prime (13817101).

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

It is a 18-Lehmer number, since φ(13817091) divides (13817091-1)¹⁸.

It is a cyclic number.

It is not a de Polignac number, because 13817091 - 2⁵ = 13817059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13817081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8190 + ... + 9731.

It is an arithmetic number, because the mean of its divisors is an integer number (2311938).

Almost surely, 2^13817091 is an apocalyptic number.

13817091 is a deficient number, since it is larger than the sum of its proper divisors (4678413).

13817091 is a wasteful number, since it uses less digits than its factorization.

13817091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18181.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 13817091 is about 3717.1347836741. The cubic root of 13817091 is about 239.9600106984.

The spelling of 13817091 in words is "thirteen million, eight hundred seventeen thousand, ninety-one".