16824197 has 4 divisors (see below), whose sum is σ = 18118380. Its totient is φ = 15530016.

The previous prime is 16824191. The next prime is 16824209. The reversal of 16824197 is 79142861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79142861 = 7 ⋅11306123.

It can be written as a sum of positive squares in 2 ways, for example, as 5541316 + 11282881 = 2354^2 + 3359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16824197 is a prime.

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 16824197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16824191) 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, 647072 + ... + 647097.

It is an arithmetic number, because the mean of its divisors is an integer number (4529595).

Almost surely, 2^16824197 is an apocalyptic number.

It is an amenable number.

16824197 is a deficient number, since it is larger than the sum of its proper divisors (1294183).

16824197 is a wasteful number, since it uses less digits than its factorization.

16824197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294182.

The product of its digits is 24192, while the sum is 38.

The square root of 16824197 is about 4101.7309760636. The cubic root of 16824197 is about 256.2387350194.

The spelling of 16824197 in words is "sixteen million, eight hundred twenty-four thousand, one hundred ninety-seven".