128535397 has 2 divisors, whose sum is σ = 128535398. Its totient is φ = 128535396.

The previous prime is 128535383. The next prime is 128535401. The reversal of 128535397 is 793535821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 7667361 = 10994^2 + 2769^2 .

It is a cyclic number.

It is not a de Polignac number, because 128535397 - 2¹⁵ = 128502629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128533397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64267698 + 64267699.

It is an arithmetic number, because the mean of its divisors is an integer number (64267699).

Almost surely, 2^128535397 is an apocalyptic number.

It is an amenable number.

128535397 is a deficient number, since it is larger than the sum of its proper divisors (1).

128535397 is an equidigital number, since it uses as much as digits as its factorization.

128535397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 128535397 is about 11337.3452359889. The cubic root of 128535397 is about 504.6701070607.

The spelling of 128535397 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, three hundred ninety-seven".