128535677 has 2 divisors, whose sum is σ = 128535678. Its totient is φ = 128535676.

The previous prime is 128535637. The next prime is 128535683. The reversal of 128535677 is 776535821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102535876 + 25999801 = 10126^2 + 5099^2 .

It is a cyclic number.

It is not a de Polignac number, because 128535677 - 2⁶ = 128535613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128535637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64267838 + 64267839.

It is an arithmetic number, because the mean of its divisors is an integer number (64267839).

Almost surely, 2^128535677 is an apocalyptic number.

It is an amenable number.

128535677 is a deficient number, since it is larger than the sum of its proper divisors (1).

128535677 is an equidigital number, since it uses as much as digits as its factorization.

128535677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 128535677 is about 11337.3575845521. The cubic root of 128535677 is about 504.6704735162.

The spelling of 128535677 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, six hundred seventy-seven".