128888897 has 4 divisors (see below), whose sum is σ = 128990640. Its totient is φ = 128787156.

The previous prime is 128888891. The next prime is 128888911. The reversal of 128888897 is 798888821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128888897 - 2¹⁶ = 128823361 is a prime.

It is a super-2 number, since 2×128888897² = 33224695539753218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128888891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48947 + ... + 51512.

It is an arithmetic number, because the mean of its divisors is an integer number (32247660).

Almost surely, 2^128888897 is an apocalyptic number.

It is an amenable number.

128888897 is a deficient number, since it is larger than the sum of its proper divisors (101743).

128888897 is a wasteful number, since it uses less digits than its factorization.

128888897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101742.

The product of its digits is 4128768, while the sum is 59.

The square root of 128888897 is about 11352.9246011766. The cubic root of 128888897 is about 505.1323340412.

The spelling of 128888897 in words is "one hundred twenty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-seven".