16396189 has 4 divisors (see below), whose sum is σ = 16404640. Its totient is φ = 16387740.

The previous prime is 16396181. The next prime is 16396229. The reversal of 16396189 is 98169361.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16396189 - 2³ = 16396181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16396181) 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, 304 + ... + 5734.

It is an arithmetic number, because the mean of its divisors is an integer number (4101160).

Almost surely, 2^16396189 is an apocalyptic number.

It is an amenable number.

16396189 is a deficient number, since it is larger than the sum of its proper divisors (8451).

16396189 is an equidigital number, since it uses as much as digits as its factorization.

16396189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450.

The product of its digits is 69984, while the sum is 43.

The square root of 16396189 is about 4049.2207892383. The cubic root of 16396189 is about 254.0471371794.

The spelling of 16396189 in words is "sixteen million, three hundred ninety-six thousand, one hundred eighty-nine".