128538107 has 2 divisors, whose sum is σ = 128538108. Its totient is φ = 128538106.

The previous prime is 128538103. The next prime is 128538119. The reversal of 128538107 is 701835821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128538107 - 2² = 128538103 is a prime.

It is a super-2 number, since 2×128538107² = 33044089902286898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128538103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64269053 + 64269054.

It is an arithmetic number, because the mean of its divisors is an integer number (64269054).

Almost surely, 2^128538107 is an apocalyptic number.

128538107 is a deficient number, since it is larger than the sum of its proper divisors (1).

128538107 is an equidigital number, since it uses as much as digits as its factorization.

128538107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 128538107 is about 11337.4647518746. The cubic root of 128538107 is about 504.6736538045.

The spelling of 128538107 in words is "one hundred twenty-eight million, five hundred thirty-eight thousand, one hundred seven".