128634073 has 2 divisors, whose sum is σ = 128634074. Its totient is φ = 128634072.

The previous prime is 128634067. The next prime is 128634119. The reversal of 128634073 is 370436821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113486409 + 15147664 = 10653^2 + 3892^2 .

It is a cyclic number.

It is not a de Polignac number, because 128634073 - 2²⁵ = 95079641 is a prime.

It is not a weakly prime, because it can be changed into another prime (128634043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64317036 + 64317037.

It is an arithmetic number, because the mean of its divisors is an integer number (64317037).

Almost surely, 2^128634073 is an apocalyptic number.

It is an amenable number.

128634073 is a deficient number, since it is larger than the sum of its proper divisors (1).

128634073 is an equidigital number, since it uses as much as digits as its factorization.

128634073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 128634073 is about 11341.6962135300. The cubic root of 128634073 is about 504.7992182903.

The spelling of 128634073 in words is "one hundred twenty-eight million, six hundred thirty-four thousand, seventy-three".