16390105 has 4 divisors (see below), whose sum is σ = 19668132. Its totient is φ = 13112080.

The previous prime is 16390097. The next prime is 16390109. The reversal of 16390105 is 50109361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3794704 + 12595401 = 1948^2 + 3549^2 .

It is not a de Polignac number, because 16390105 - 2³ = 16390097 is a prime.

It is a super-2 number, since 2×16390105² = 537271083822050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16390105.

It is not an unprimeable number, because it can be changed into a prime (16390109) 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, 1639006 + ... + 1639015.

It is an arithmetic number, because the mean of its divisors is an integer number (4917033).

Almost surely, 2^16390105 is an apocalyptic number.

It is an amenable number.

16390105 is a deficient number, since it is larger than the sum of its proper divisors (3278027).

16390105 is an equidigital number, since it uses as much as digits as its factorization.

16390105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278026.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 16390105 is about 4048.4694638839. The cubic root of 16390105 is about 254.0157108930.

Adding to 16390105 its reverse (50109361), we get a palindrome (66499466).

The spelling of 16390105 in words is "sixteen million, three hundred ninety thousand, one hundred five".