16898197 has 4 divisors (see below), whose sum is σ = 16968556. Its totient is φ = 16827840.

The previous prime is 16898171. The next prime is 16898207. The reversal of 16898197 is 79189861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79189861 = 199 ⋅397939.

It can be written as a sum of positive squares in 2 ways, for example, as 9790641 + 7107556 = 3129^2 + 2666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16898197 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 16898197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16898797) 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, 34818 + ... + 35299.

It is an arithmetic number, because the mean of its divisors is an integer number (4242139).

Almost surely, 2^16898197 is an apocalyptic number.

It is an amenable number.

16898197 is a deficient number, since it is larger than the sum of its proper divisors (70359).

16898197 is an equidigital number, since it uses as much as digits as its factorization.

16898197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70358.

The product of its digits is 217728, while the sum is 49.

The square root of 16898197 is about 4110.7416605766. The cubic root of 16898197 is about 256.6138680024.

The spelling of 16898197 in words is "sixteen million, eight hundred ninety-eight thousand, one hundred ninety-seven".