16405089 has 4 divisors (see below), whose sum is σ = 21873456. Its totient is φ = 10936724.

The previous prime is 16405079. The next prime is 16405091. The reversal of 16405089 is 98050461.

16405089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16405089 - 2⁵ = 16405057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16405079) 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, 2734179 + ... + 2734184.

It is an arithmetic number, because the mean of its divisors is an integer number (5468364).

Almost surely, 2^16405089 is an apocalyptic number.

It is an amenable number.

16405089 is a deficient number, since it is larger than the sum of its proper divisors (5468367).

16405089 is an equidigital number, since it uses as much as digits as its factorization.

16405089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468366.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16405089 is about 4050.3196170179. The cubic root of 16405089 is about 254.0930952278.

The spelling of 16405089 in words is "sixteen million, four hundred five thousand, eighty-nine".