128535073 has 2 divisors, whose sum is σ = 128535074. Its totient is φ = 128535072.

The previous prime is 128535061. The next prime is 128535101. The reversal of 128535073 is 370535821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118875409 + 9659664 = 10903^2 + 3108^2 .

It is a cyclic number.

It is not a de Polignac number, because 128535073 - 2²¹ = 126437921 is a prime.

It is a super-2 number, since 2×128535073² = 33042529982230658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128535053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64267536 + 64267537.

It is an arithmetic number, because the mean of its divisors is an integer number (64267537).

Almost surely, 2^128535073 is an apocalyptic number.

It is an amenable number.

128535073 is a deficient number, since it is larger than the sum of its proper divisors (1).

128535073 is an equidigital number, since it uses as much as digits as its factorization.

128535073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 128535073 is about 11337.3309469204. The cubic root of 128535073 is about 504.6696830186.

The spelling of 128535073 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, seventy-three".