16397105 has 16 divisors (see below), whose sum is σ = 20553744. Its totient is φ = 12545280.

The previous prime is 16397063. The next prime is 16397107. The reversal of 16397105 is 50179361.

It can be written as a sum of positive squares in 8 ways, for example, as 461041 + 15936064 = 679^2 + 3992^2 .

It is not a de Polignac number, because 16397105 - 2¹⁸ = 16134961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16397107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10559 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (1284609).

Almost surely, 2^16397105 is an apocalyptic number.

It is an amenable number.

16397105 is a deficient number, since it is larger than the sum of its proper divisors (4156639).

16397105 is a wasteful number, since it uses less digits than its factorization.

16397105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 16397105 is about 4049.3338958402. Note that the first 3 decimals coincide. The cubic root of 16397105 is about 254.0518680113.

The spelling of 16397105 in words is "sixteen million, three hundred ninety-seven thousand, one hundred five".