128692219 has 2 divisors, whose sum is σ = 128692220. Its totient is φ = 128692218.

The previous prime is 128692189. The next prime is 128692243. The reversal of 128692219 is 912296821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128692219 is a prime.

It is a super-2 number, since 2×128692219² = 33123374462287922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128602219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64346109 + 64346110.

It is an arithmetic number, because the mean of its divisors is an integer number (64346110).

Almost surely, 2^128692219 is an apocalyptic number.

128692219 is a deficient number, since it is larger than the sum of its proper divisors (1).

128692219 is an equidigital number, since it uses as much as digits as its factorization.

128692219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 128692219 is about 11344.2592971071. The cubic root of 128692219 is about 504.8752676945.

The spelling of 128692219 in words is "one hundred twenty-eight million, six hundred ninety-two thousand, two hundred nineteen".