128787853 has 4 divisors (see below), whose sum is σ = 128816028. Its totient is φ = 128759680.

The previous prime is 128787851. The next prime is 128787877. The reversal of 128787853 is 358787821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93954249 + 34833604 = 9693^2 + 5902^2 .

It is a cyclic number.

It is not a de Polignac number, because 128787853 - 2¹ = 128787851 is a prime.

It is a super-2 number, since 2×128787853² = 33172622160699218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128787797 and 128787806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128787851) 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, 5476 + ... + 16957.

It is an arithmetic number, because the mean of its divisors is an integer number (32204007).

Almost surely, 2^128787853 is an apocalyptic number.

It is an amenable number.

128787853 is a deficient number, since it is larger than the sum of its proper divisors (28175).

128787853 is an equidigital number, since it uses as much as digits as its factorization.

128787853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28174.

The product of its digits is 752640, while the sum is 49.

The square root of 128787853 is about 11348.4735978016. The cubic root of 128787853 is about 505.0002980098. Note that the first 3 decimals are identical.

The spelling of 128787853 in words is "one hundred twenty-eight million, seven hundred eighty-seven thousand, eight hundred fifty-three".