5128657 has 2 divisors, whose sum is σ = 5128658. Its totient is φ = 5128656.

The previous prime is 5128639. The next prime is 5128661. The reversal of 5128657 is 7568215.

5128657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4769856 + 358801 = 2184^2 + 599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5128657 is a prime.

It is not a weakly prime, because it can be changed into another prime (5128637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564328 + 2564329.

It is an arithmetic number, because the mean of its divisors is an integer number (2564329).

Almost surely, 2^5128657 is an apocalyptic number.

It is an amenable number.

5128657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5128657 is an equidigital number, since it uses as much as digits as its factorization.

5128657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 5128657 is about 2264.6538366823. The cubic root of 5128657 is about 172.4518608233.

The spelling of 5128657 in words is "five million, one hundred twenty-eight thousand, six hundred fifty-seven".