128896897 has 2 divisors, whose sum is σ = 128896898. Its totient is φ = 128896896.

The previous prime is 128896847. The next prime is 128896913. The reversal of 128896897 is 798698821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98327056 + 30569841 = 9916^2 + 5529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128896897 is a prime.

It is a super-2 number, since 2×128896897² = 33228820112457218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128896847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64448448 + 64448449.

It is an arithmetic number, because the mean of its divisors is an integer number (64448449).

Almost surely, 2^128896897 is an apocalyptic number.

It is an amenable number.

128896897 is a deficient number, since it is larger than the sum of its proper divisors (1).

128896897 is an equidigital number, since it uses as much as digits as its factorization.

128896897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 58.

The square root of 128896897 is about 11353.2769278301. The cubic root of 128896897 is about 505.1427848381.

The spelling of 128896897 in words is "one hundred twenty-eight million, eight hundred ninety-six thousand, eight hundred ninety-seven".