128119669 has 2 divisors, whose sum is σ = 128119670. Its totient is φ = 128119668.

The previous prime is 128119643. The next prime is 128119699. The reversal of 128119669 is 966911821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82719025 + 45400644 = 9095^2 + 6738^2 .

It is an emirp because it is prime and its reverse (966911821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128119669 is a prime.

It is a super-2 number, since 2×128119669² = 32829299169339122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128119619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64059834 + 64059835.

It is an arithmetic number, because the mean of its divisors is an integer number (64059835).

Almost surely, 2^128119669 is an apocalyptic number.

It is an amenable number.

128119669 is a deficient number, since it is larger than the sum of its proper divisors (1).

128119669 is an equidigital number, since it uses as much as digits as its factorization.

128119669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 128119669 is about 11318.9959360360. The cubic root of 128119669 is about 504.1254267598.

The spelling of 128119669 in words is "one hundred twenty-eight million, one hundred nineteen thousand, six hundred sixty-nine".