16394109 has 4 divisors (see below), whose sum is σ = 21858816. Its totient is φ = 10929404.

The previous prime is 16394089. The next prime is 16394111. The reversal of 16394109 is 90149361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16394109 - 2¹² = 16390013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16394109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16394129) 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, 2732349 + ... + 2732354.

It is an arithmetic number, because the mean of its divisors is an integer number (5464704).

Almost surely, 2^16394109 is an apocalyptic number.

It is an amenable number.

16394109 is a deficient number, since it is larger than the sum of its proper divisors (5464707).

16394109 is an equidigital number, since it uses as much as digits as its factorization.

16394109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5464706.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 16394109 is about 4048.9639415534. The cubic root of 16394109 is about 254.0363940246.

The spelling of 16394109 in words is "sixteen million, three hundred ninety-four thousand, one hundred nine".