128313269 has 16 divisors (see below), whose sum is σ = 149143680. Its totient is φ = 108121920.

The previous prime is 128313257. The next prime is 128313271. The reversal of 128313269 is 962313821.

It is a cyclic number.

It is not a de Polignac number, because 128313269 - 2⁸ = 128313013 is a prime.

It is a super-2 number, since 2×128313269² = 32928590002932722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128313209) 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, 155879 + ... + 156699.

It is an arithmetic number, because the mean of its divisors is an integer number (9321480).

Almost surely, 2^128313269 is an apocalyptic number.

It is an amenable number.

128313269 is a deficient number, since it is larger than the sum of its proper divisors (20830411).

128313269 is an equidigital number, since it uses as much as digits as its factorization.

128313269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its digits is 15552, while the sum is 35.

The square root of 128313269 is about 11327.5447030678. The cubic root of 128313269 is about 504.3792248028.

The spelling of 128313269 in words is "one hundred twenty-eight million, three hundred thirteen thousand, two hundred sixty-nine".