128894071 has 2 divisors, whose sum is σ = 128894072. Its totient is φ = 128894070.

The previous prime is 128894057. The next prime is 128894083. The reversal of 128894071 is 170498821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128894071 - 2¹⁵ = 128861303 is a prime.

It is a super-2 number, since 2×128894071² = 33227363077906082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128894011) 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, 64447035 + 64447036.

It is an arithmetic number, because the mean of its divisors is an integer number (64447036).

Almost surely, 2^128894071 is an apocalyptic number.

128894071 is a deficient number, since it is larger than the sum of its proper divisors (1).

128894071 is an equidigital number, since it uses as much as digits as its factorization.

128894071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 128894071 is about 11353.1524696888. The cubic root of 128894071 is about 505.1390931435.

It can be divided in two parts, 1288 and 94071, that added together give a palindrome (95359).

The spelling of 128894071 in words is "one hundred twenty-eight million, eight hundred ninety-four thousand, seventy-one".