16217197 has 2 divisors, whose sum is σ = 16217198. Its totient is φ = 16217196.

The previous prime is 16217191. The next prime is 16217207. The reversal of 16217197 is 79171261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8213956 + 8003241 = 2866^2 + 2829^2 .

It is a cyclic number.

It is not a de Polignac number, because 16217197 - 2¹¹ = 16215149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16217191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108598 + 8108599.

It is an arithmetic number, because the mean of its divisors is an integer number (8108599).

Almost surely, 2^16217197 is an apocalyptic number.

It is an amenable number.

16217197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16217197 is an equidigital number, since it uses as much as digits as its factorization.

16217197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 34.

The square root of 16217197 is about 4027.0581073533. The cubic root of 16217197 is about 253.1193019497.

The spelling of 16217197 in words is "sixteen million, two hundred seventeen thousand, one hundred ninety-seven".