128885479 has 2 divisors, whose sum is σ = 128885480. Its totient is φ = 128885478.

The previous prime is 128885473. The next prime is 128885503. The reversal of 128885479 is 974588821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128885479 - 2²¹ = 126788327 is a prime.

It is a super-2 number, since 2×128885479² = 33222933394118882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128885473) 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, 64442739 + 64442740.

It is an arithmetic number, because the mean of its divisors is an integer number (64442740).

Almost surely, 2^128885479 is an apocalyptic number.

128885479 is a deficient number, since it is larger than the sum of its proper divisors (1).

128885479 is an equidigital number, since it uses as much as digits as its factorization.

128885479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 52.

The square root of 128885479 is about 11352.7740662800. The cubic root of 128885479 is about 505.1278688063.

The spelling of 128885479 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, four hundred seventy-nine".