128214439 has 2 divisors, whose sum is σ = 128214440. Its totient is φ = 128214438.

The previous prime is 128214407. The next prime is 128214461. The reversal of 128214439 is 934412821.

It is a strong prime.

It is an emirp because it is prime and its reverse (934412821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128214439 - 2⁵ = 128214407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128214239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64107219 + 64107220.

It is an arithmetic number, because the mean of its divisors is an integer number (64107220).

Almost surely, 2^128214439 is an apocalyptic number.

128214439 is a deficient number, since it is larger than the sum of its proper divisors (1).

128214439 is an equidigital number, since it uses as much as digits as its factorization.

128214439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 128214439 is about 11323.1814875502. The cubic root of 128214439 is about 504.2496964938.

The spelling of 128214439 in words is "one hundred twenty-eight million, two hundred fourteen thousand, four hundred thirty-nine".