128957107 has 2 divisors, whose sum is σ = 128957108. Its totient is φ = 128957106.

The previous prime is 128957093. The next prime is 128957119. The reversal of 128957107 is 701759821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128957107 - 2¹¹ = 128955059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128957107.

It is not a weakly prime, because it can be changed into another prime (128957167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64478553 + 64478554.

It is an arithmetic number, because the mean of its divisors is an integer number (64478554).

Almost surely, 2^128957107 is an apocalyptic number.

128957107 is a deficient number, since it is larger than the sum of its proper divisors (1).

128957107 is an equidigital number, since it uses as much as digits as its factorization.

128957107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 128957107 is about 11355.9282755748. The cubic root of 128957107 is about 505.2214262776.

It can be divided in two parts, 12895 and 7107, that added together give a palindrome (20002).

The spelling of 128957107 in words is "one hundred twenty-eight million, nine hundred fifty-seven thousand, one hundred seven".