128247935029 has 2 divisors, whose sum is σ = 128247935030. Its totient is φ = 128247935028.

The previous prime is 128247935021. The next prime is 128247935083. The reversal of 128247935029 is 920539742821.

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., 81733092100 + 46514842929 = 285890^2 + 215673^2 .

It is a cyclic number.

It is not a de Polignac number, because 128247935029 - 2³ = 128247935021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128247935021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64123967514 + 64123967515.

It is an arithmetic number, because the mean of its divisors is an integer number (64123967515).

Almost surely, 2^128247935029 is an apocalyptic number.

It is an amenable number.

128247935029 is a deficient number, since it is larger than the sum of its proper divisors (1).

128247935029 is an equidigital number, since it uses as much as digits as its factorization.

128247935029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 128247935029 in words is "one hundred twenty-eight billion, two hundred forty-seven million, nine hundred thirty-five thousand, twenty-nine".