16620089 has 4 divisors (see below), whose sum is σ = 16628724. Its totient is φ = 16611456.

The previous prime is 16620049. The next prime is 16620119. The reversal of 16620089 is 98002661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 15840400 = 883^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 16620089 - 2⁸ = 16619833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16620049) 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, 29 + ... + 5765.

It is an arithmetic number, because the mean of its divisors is an integer number (4157181).

Almost surely, 2^16620089 is an apocalyptic number.

It is an amenable number.

16620089 is a deficient number, since it is larger than the sum of its proper divisors (8635).

16620089 is an equidigital number, since it uses as much as digits as its factorization.

16620089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8634.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 16620089 is about 4076.7743376351. The cubic root of 16620089 is about 255.1983027520.

The spelling of 16620089 in words is "sixteen million, six hundred twenty thousand, eighty-nine".