16998197 has 2 divisors, whose sum is σ = 16998198. Its totient is φ = 16998196.

The previous prime is 16998187. The next prime is 16998211. The reversal of 16998197 is 79189961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13645636 + 3352561 = 3694^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 16998197 - 2¹⁴ = 16981813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16998187) 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 as a sum of consecutive naturals, namely, 8499098 + 8499099.

It is an arithmetic number, because the mean of its divisors is an integer number (8499099).

Almost surely, 2^16998197 is an apocalyptic number.

It is an amenable number.

16998197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16998197 is an equidigital number, since it uses as much as digits as its factorization.

16998197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 50.

The square root of 16998197 is about 4122.8869739541. The cubic root of 16998197 is about 257.1190685078.

The spelling of 16998197 in words is "sixteen million, nine hundred ninety-eight thousand, one hundred ninety-seven".