16909219 has 2 divisors, whose sum is σ = 16909220. Its totient is φ = 16909218.

The previous prime is 16909187. The next prime is 16909231. The reversal of 16909219 is 91290961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16909219 - 2⁵ = 16909187 is a prime.

It is a super-2 number, since 2×16909219² = 571843374379922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16904219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8454609 + 8454610.

It is an arithmetic number, because the mean of its divisors is an integer number (8454610).

Almost surely, 2^16909219 is an apocalyptic number.

16909219 is a deficient number, since it is larger than the sum of its proper divisors (1).

16909219 is an equidigital number, since it uses as much as digits as its factorization.

16909219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 16909219 is about 4112.0820760291. The cubic root of 16909219 is about 256.6696487725.

The spelling of 16909219 in words is "sixteen million, nine hundred nine thousand, two hundred nineteen".