16885091 has 4 divisors (see below), whose sum is σ = 17773800. Its totient is φ = 15996384.

The previous prime is 16885087. The next prime is 16885093. The reversal of 16885091 is 19058861.

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 16885091 - 2² = 16885087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16885093) 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, 444326 + ... + 444363.

It is an arithmetic number, because the mean of its divisors is an integer number (4443450).

Almost surely, 2^16885091 is an apocalyptic number.

16885091 is a deficient number, since it is larger than the sum of its proper divisors (888709).

16885091 is an equidigital number, since it uses as much as digits as its factorization.

16885091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888708.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 16885091 is about 4109.1472351329. The cubic root of 16885091 is about 256.5475088280.

The spelling of 16885091 in words is "sixteen million, eight hundred eighty-five thousand, ninety-one".