128534279 has 2 divisors, whose sum is σ = 128534280. Its totient is φ = 128534278.

The previous prime is 128534269. The next prime is 128534291. The reversal of 128534279 is 972435821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128534279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128534249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64267139 + 64267140.

It is an arithmetic number, because the mean of its divisors is an integer number (64267140).

Almost surely, 2^128534279 is an apocalyptic number.

128534279 is a deficient number, since it is larger than the sum of its proper divisors (1).

128534279 is an equidigital number, since it uses as much as digits as its factorization.

128534279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 128534279 is about 11337.2959298062. The cubic root of 128534279 is about 504.6686438507.

The spelling of 128534279 in words is "one hundred twenty-eight million, five hundred thirty-four thousand, two hundred seventy-nine".