128535637 has 2 divisors, whose sum is σ = 128535638. Its totient is φ = 128535636.

The previous prime is 128535629. The next prime is 128535677. The reversal of 128535637 is 736535821.

It is an a-pointer prime, because the next prime (128535677) can be obtained adding 128535637 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127441521 + 1094116 = 11289^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 128535637 - 2³ = 128535629 is a prime.

It is a super-3 number, since 3×128535637³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128535637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128535677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64267818 + 64267819.

It is an arithmetic number, because the mean of its divisors is an integer number (64267819).

Almost surely, 2^128535637 is an apocalyptic number.

It is an amenable number.

128535637 is a deficient number, since it is larger than the sum of its proper divisors (1).

128535637 is an equidigital number, since it uses as much as digits as its factorization.

128535637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 128535637 is about 11337.3558204724. The cubic root of 128535637 is about 504.6704211654.

The spelling of 128535637 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, six hundred thirty-seven".