16897247 has 4 divisors (see below), whose sum is σ = 16906656. Its totient is φ = 16887840.

The previous prime is 16897241. The next prime is 16897261. The reversal of 16897247 is 74279861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74279861 = 347 ⋅214063.

It is a cyclic number.

It is not a de Polignac number, because 16897247 - 2⁸ = 16896991 is a prime.

It is a Duffinian number.

Its product of digits (169344) is a multiple of the sum of its prime divisors (9408).

It is a junction number, because it is equal to n+sod(n) for n = 16897198 and 16897207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16897241) 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 3 ways as a sum of consecutive naturals, for example, 1079 + ... + 5912.

It is an arithmetic number, because the mean of its divisors is an integer number (4226664).

Almost surely, 2^16897247 is an apocalyptic number.

16897247 is a deficient number, since it is larger than the sum of its proper divisors (9409).

16897247 is an equidigital number, since it uses as much as digits as its factorization.

16897247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408.

The product of its digits is 169344, while the sum is 44.

The square root of 16897247 is about 4110.6261080278. The cubic root of 16897247 is about 256.6090590526.

The spelling of 16897247 in words is "sixteen million, eight hundred ninety-seven thousand, two hundred forty-seven".