318428129 has 4 divisors (see below), whose sum is σ = 318971184. Its totient is φ = 317885076.

The previous prime is 318428111. The next prime is 318428137. The reversal of 318428129 is 921824813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 318428129 - 2⁸ = 318427873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318428092 and 318428101.

It is not an unprimeable number, because it can be changed into a prime (318428189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270647 + ... + 271820.

It is an arithmetic number, because the mean of its divisors is an integer number (79742796).

Almost surely, 2^318428129 is an apocalyptic number.

It is an amenable number.

318428129 is a deficient number, since it is larger than the sum of its proper divisors (543055).

318428129 is an equidigital number, since it uses as much as digits as its factorization.

318428129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543054.

The product of its digits is 27648, while the sum is 38.

The square root of 318428129 is about 17844.5546035758. The cubic root of 318428129 is about 682.8685975611.

It can be divided in two parts, 3184 and 28129, that added together give a palindrome (31313).

The spelling of 318428129 in words is "three hundred eighteen million, four hundred twenty-eight thousand, one hundred twenty-nine".