16427091 has 4 divisors (see below), whose sum is σ = 21902792. Its totient is φ = 10951392.

The previous prime is 16427071. The next prime is 16427093. The reversal of 16427091 is 19072461.

It is a happy number.

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

It is not a de Polignac number, because 16427091 - 2⁶ = 16427027 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16427093) 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, 2737846 + ... + 2737851.

It is an arithmetic number, because the mean of its divisors is an integer number (5475698).

Almost surely, 2^16427091 is an apocalyptic number.

16427091 is a deficient number, since it is larger than the sum of its proper divisors (5475701).

16427091 is an equidigital number, since it uses as much as digits as its factorization.

16427091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475700.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 16427091 is about 4053.0347888958. The cubic root of 16427091 is about 254.2066384267.

The spelling of 16427091 in words is "sixteen million, four hundred twenty-seven thousand, ninety-one".