128887907 has 2 divisors, whose sum is σ = 128887908. Its totient is φ = 128887906.

The previous prime is 128887903. The next prime is 128887921. The reversal of 128887907 is 709788821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128887907 - 2² = 128887903 is a prime.

It is a super-2 number, since 2×128887907² = 33224185141681298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128887901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64443953 + 64443954.

It is an arithmetic number, because the mean of its divisors is an integer number (64443954).

Almost surely, 2^128887907 is an apocalyptic number.

128887907 is a deficient number, since it is larger than the sum of its proper divisors (1).

128887907 is an equidigital number, since it uses as much as digits as its factorization.

128887907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 50.

The square root of 128887907 is about 11352.8809999929. The cubic root of 128887907 is about 505.1310407250.

The spelling of 128887907 in words is "one hundred twenty-eight million, eight hundred eighty-seven thousand, nine hundred seven".