16171091 has 4 divisors (see below), whose sum is σ = 16314312. Its totient is φ = 16027872.

The previous prime is 16171079. The next prime is 16171117. The reversal of 16171091 is 19017161.

16171091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 16171091 - 2⁶ = 16171027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16171091.

It is not an unprimeable number, because it can be changed into a prime (16171021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71441 + ... + 71666.

It is an arithmetic number, because the mean of its divisors is an integer number (4078578).

Almost surely, 2^16171091 is an apocalyptic number.

16171091 is a deficient number, since it is larger than the sum of its proper divisors (143221).

16171091 is a wasteful number, since it uses less digits than its factorization.

16171091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143220.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 16171091 is about 4021.3295065190. The cubic root of 16171091 is about 252.8791988926.

The spelling of 16171091 in words is "sixteen million, one hundred seventy-one thousand, ninety-one".