16497385 has 4 divisors (see below), whose sum is σ = 19796868. Its totient is φ = 13197904.

The previous prime is 16497379. The next prime is 16497391. The reversal of 16497385 is 58379461.

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

It is an interprime number because it is at equal distance from previous prime (16497379) and next prime (16497391).

It can be written as a sum of positive squares in 2 ways, for example, as 5368489 + 11128896 = 2317^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 16497385 - 2⁵ = 16497353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649734 + ... + 1649743.

It is an arithmetic number, because the mean of its divisors is an integer number (4949217).

Almost surely, 2^16497385 is an apocalyptic number.

It is an amenable number.

16497385 is a deficient number, since it is larger than the sum of its proper divisors (3299483).

16497385 is an equidigital number, since it uses as much as digits as its factorization.

16497385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299482.

The product of its digits is 181440, while the sum is 43.

The square root of 16497385 is about 4061.6973053146. The cubic root of 16497385 is about 254.5687186336.

The spelling of 16497385 in words is "sixteen million, four hundred ninety-seven thousand, three hundred eighty-five".