16585397 has 4 divisors (see below), whose sum is σ = 16621836. Its totient is φ = 16548960.

The previous prime is 16585367. The next prime is 16585399. The reversal of 16585397 is 79358561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79358561 = 277 ⋅286493.

It can be written as a sum of positive squares in 2 ways, for example, as 11771761 + 4813636 = 3431^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 16585397 - 2⁶ = 16585333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16585399) 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, 17528 + ... + 18449.

It is an arithmetic number, because the mean of its divisors is an integer number (4155459).

Almost surely, 2^16585397 is an apocalyptic number.

It is an amenable number.

16585397 is a deficient number, since it is larger than the sum of its proper divisors (36439).

16585397 is an equidigital number, since it uses as much as digits as its factorization.

16585397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36438.

The product of its digits is 226800, while the sum is 44.

The square root of 16585397 is about 4072.5172805035. The cubic root of 16585397 is about 255.0206160443.

The spelling of 16585397 in words is "sixteen million, five hundred eighty-five thousand, three hundred ninety-seven".