128229413 has 4 divisors (see below), whose sum is σ = 138093228. Its totient is φ = 118365600.

The previous prime is 128229407. The next prime is 128229449. The reversal of 128229413 is 314922821.

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 13675204 + 114554209 = 3698^2 + 10703^2 .

It is a cyclic number.

It is not a de Polignac number, because 128229413 - 2²⁴ = 111452197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128229413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128220413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4931888 + ... + 4931913.

It is an arithmetic number, because the mean of its divisors is an integer number (34523307).

Almost surely, 2^128229413 is an apocalyptic number.

128229413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128229413 is a deficient number, since it is larger than the sum of its proper divisors (9863815).

128229413 is an equidigital number, since it uses as much as digits as its factorization.

128229413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9863814.

The product of its digits is 6912, while the sum is 32.

The square root of 128229413 is about 11323.8426781725. The cubic root of 128229413 is about 504.2693259550.

The spelling of 128229413 in words is "one hundred twenty-eight million, two hundred twenty-nine thousand, four hundred thirteen".