13915091 has 4 divisors (see below), whose sum is σ = 14151000. Its totient is φ = 13679184.

The previous prime is 13915081. The next prime is 13915117. The reversal of 13915091 is 19051931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13915091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13915021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117866 + ... + 117983.

It is an arithmetic number, because the mean of its divisors is an integer number (3537750).

Almost surely, 2^13915091 is an apocalyptic number.

13915091 is a deficient number, since it is larger than the sum of its proper divisors (235909).

13915091 is an equidigital number, since it uses as much as digits as its factorization.

13915091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235908.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 13915091 is about 3730.2936881699. The cubic root of 13915091 is about 240.5259933610.

The spelling of 13915091 in words is "thirteen million, nine hundred fifteen thousand, ninety-one".