16699217 has 2 divisors, whose sum is σ = 16699218. Its totient is φ = 16699216.

The previous prime is 16699211. The next prime is 16699223. The reversal of 16699217 is 71299661.

It is a balanced prime because it is at equal distance from previous prime (16699211) and next prime (16699223).

It can be written as a sum of positive squares in only one way, i.e., 11015761 + 5683456 = 3319^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 16699217 - 2⁸ = 16698961 is a prime.

It is not a weakly prime, because it can be changed into another prime (16699211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8349608 + 8349609.

It is an arithmetic number, because the mean of its divisors is an integer number (8349609).

Almost surely, 2^16699217 is an apocalyptic number.

It is an amenable number.

16699217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16699217 is an equidigital number, since it uses as much as digits as its factorization.

16699217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 16699217 is about 4086.4675454480. The cubic root of 16699217 is about 255.6026601751.

The spelling of 16699217 in words is "sixteen million, six hundred ninety-nine thousand, two hundred seventeen".