128836897 has 16 divisors (see below), whose sum is σ = 158049792. Its totient is φ = 102504960.

The previous prime is 128836871. The next prime is 128836907. The reversal of 128836897 is 798638821.

It is a cyclic number.

It is not a de Polignac number, because 128836897 - 2¹⁵ = 128804129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128836817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272 + ... + 16102.

It is an arithmetic number, because the mean of its divisors is an integer number (9878112).

Almost surely, 2^128836897 is an apocalyptic number.

128836897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

128836897 is a deficient number, since it is larger than the sum of its proper divisors (29212895).

128836897 is a wasteful number, since it uses less digits than its factorization.

128836897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14928.

The product of its digits is 1161216, while the sum is 52.

The square root of 128836897 is about 11350.6342113558. The cubic root of 128836897 is about 505.0643933180.

The spelling of 128836897 in words is "one hundred twenty-eight million, eight hundred thirty-six thousand, eight hundred ninety-seven".