128679851 has 12 divisors (see below), whose sum is σ = 137295312. Its totient is φ = 120578688.

The previous prime is 128679847. The next prime is 128679877. The reversal of 128679851 is 158976821.

It is not a de Polignac number, because 128679851 - 2² = 128679847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128679796 and 128679805.

It is not an unprimeable number, because it can be changed into a prime (128670851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75161 + ... + 76853.

It is an arithmetic number, because the mean of its divisors is an integer number (11441276).

Almost surely, 2^128679851 is an apocalyptic number.

128679851 is a deficient number, since it is larger than the sum of its proper divisors (8615461).

128679851 is a wasteful number, since it uses less digits than its factorization.

128679851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1973 counting only the distinct ones).

The product of its digits is 241920, while the sum is 47.

The square root of 128679851 is about 11343.7141624778. The cubic root of 128679851 is about 504.8590934523.

The spelling of 128679851 in words is "one hundred twenty-eight million, six hundred seventy-nine thousand, eight hundred fifty-one".