128355907 has 2 divisors, whose sum is σ = 128355908. Its totient is φ = 128355906.

The previous prime is 128355883. The next prime is 128355917. The reversal of 128355907 is 709553821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128355907 - 2²³ = 119967299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128355907.

It is not a weakly prime, because it can be changed into another prime (128355917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64177953 + 64177954.

It is an arithmetic number, because the mean of its divisors is an integer number (64177954).

Almost surely, 2^128355907 is an apocalyptic number.

128355907 is a deficient number, since it is larger than the sum of its proper divisors (1).

128355907 is an equidigital number, since it uses as much as digits as its factorization.

128355907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 128355907 is about 11329.4265962581. The cubic root of 128355907 is about 504.4350863670.

The spelling of 128355907 in words is "one hundred twenty-eight million, three hundred fifty-five thousand, nine hundred seven".