128707693 has 2 divisors, whose sum is σ = 128707694. Its totient is φ = 128707692.

The previous prime is 128707681. The next prime is 128707703. The reversal of 128707693 is 396707821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124055044 + 4652649 = 11138^2 + 2157^2 .

It is a cyclic number.

It is not a de Polignac number, because 128707693 - 2⁹ = 128707181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128707613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64353846 + 64353847.

It is an arithmetic number, because the mean of its divisors is an integer number (64353847).

Almost surely, 2^128707693 is an apocalyptic number.

It is an amenable number.

128707693 is a deficient number, since it is larger than the sum of its proper divisors (1).

128707693 is an equidigital number, since it uses as much as digits as its factorization.

128707693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 128707693 is about 11344.9412955731. The cubic root of 128707693 is about 504.8955023464.

The spelling of 128707693 in words is "one hundred twenty-eight million, seven hundred seven thousand, six hundred ninety-three".