8729219 has 2 divisors, whose sum is σ = 8729220. Its totient is φ = 8729218.

The previous prime is 8729207. The next prime is 8729221. The reversal of 8729219 is 9129278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8729219 - 2⁸ = 8728963 is a prime.

It is a super-2 number, since 2×8729219² = 152398528699922, which contains 22 as substring.

Together with 8729221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8729239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364609 + 4364610.

It is an arithmetic number, because the mean of its divisors is an integer number (4364610).

Almost surely, 2^8729219 is an apocalyptic number.

8729219 is a deficient number, since it is larger than the sum of its proper divisors (1).

8729219 is an equidigital number, since it uses as much as digits as its factorization.

8729219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 8729219 is about 2954.5251733570. The cubic root of 8729219 is about 205.9010034277.

The spelling of 8729219 in words is "eight million, seven hundred twenty-nine thousand, two hundred nineteen".