16612189 has 4 divisors (see below), whose sum is σ = 18122400. Its totient is φ = 15101980.

The previous prime is 16612171. The next prime is 16612229. The reversal of 16612189 is 98121661.

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 16612189 - 2¹³ = 16603997 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 (16612109) 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, 755089 + ... + 755110.

It is an arithmetic number, because the mean of its divisors is an integer number (4530600).

Almost surely, 2^16612189 is an apocalyptic number.

It is an amenable number.

16612189 is a deficient number, since it is larger than the sum of its proper divisors (1510211).

16612189 is a wasteful number, since it uses less digits than its factorization.

16612189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510210.

The product of its digits is 5184, while the sum is 34.

The square root of 16612189 is about 4075.8053191977. The cubic root of 16612189 is about 255.1578620118.

The spelling of 16612189 in words is "sixteen million, six hundred twelve thousand, one hundred eighty-nine".