128846899 has 4 divisors (see below), whose sum is σ = 128889040. Its totient is φ = 128804760.

The previous prime is 128846891. The next prime is 128846909. The reversal of 128846899 is 998648821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998648821 = 271 ⋅3685051.

It is a cyclic number.

It is not a de Polignac number, because 128846899 - 2³ = 128846891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128846891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16092 + ... + 22729.

It is an arithmetic number, because the mean of its divisors is an integer number (32222260).

Almost surely, 2^128846899 is an apocalyptic number.

128846899 is a deficient number, since it is larger than the sum of its proper divisors (42141).

128846899 is an equidigital number, since it uses as much as digits as its factorization.

128846899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42140.

The product of its digits is 1990656, while the sum is 55.

The square root of 128846899 is about 11351.0747949258. The cubic root of 128846899 is about 505.0774628746.

The spelling of 128846899 in words is "one hundred twenty-eight million, eight hundred forty-six thousand, eight hundred ninety-nine".