128677751 has 2 divisors, whose sum is σ = 128677752. Its totient is φ = 128677750.

The previous prime is 128677729. The next prime is 128677771. The reversal of 128677751 is 157776821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128677751 - 2¹⁴ = 128661367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128677771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64338875 + 64338876.

It is an arithmetic number, because the mean of its divisors is an integer number (64338876).

Almost surely, 2^128677751 is an apocalyptic number.

128677751 is a deficient number, since it is larger than the sum of its proper divisors (1).

128677751 is an equidigital number, since it uses as much as digits as its factorization.

128677751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 44.

The square root of 128677751 is about 11343.6215998243. The cubic root of 128677751 is about 504.8563470760.

The spelling of 128677751 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, seven hundred fifty-one".