16219869 has 4 divisors (see below), whose sum is σ = 21626496. Its totient is φ = 10813244.

The previous prime is 16219849. The next prime is 16219873. The reversal of 16219869 is 96891261.

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 16219869 - 2⁷ = 16219741 is a prime.

It is a super-2 number, since 2×16219869² = 526168300754322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16219869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16219849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2703309 + ... + 2703314.

It is an arithmetic number, because the mean of its divisors is an integer number (5406624).

Almost surely, 2^16219869 is an apocalyptic number.

It is an amenable number.

16219869 is a deficient number, since it is larger than the sum of its proper divisors (5406627).

16219869 is an equidigital number, since it uses as much as digits as its factorization.

16219869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5406626.

The product of its digits is 46656, while the sum is 42.

The square root of 16219869 is about 4027.3898495179. The cubic root of 16219869 is about 253.1332027825.

The spelling of 16219869 in words is "sixteen million, two hundred nineteen thousand, eight hundred sixty-nine".