128910413 has 4 divisors (see below), whose sum is σ = 129048348. Its totient is φ = 128772480.

The previous prime is 128910403. The next prime is 128910487. The reversal of 128910413 is 314019821.

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 103286569 + 25623844 = 10163^2 + 5062^2 .

It is a cyclic number.

It is not a de Polignac number, because 128910413 - 2²⁶ = 61801549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128910403) 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, 67556 + ... + 69437.

It is an arithmetic number, because the mean of its divisors is an integer number (32262087).

Almost surely, 2^128910413 is an apocalyptic number.

It is an amenable number.

128910413 is a deficient number, since it is larger than the sum of its proper divisors (137935).

128910413 is an equidigital number, since it uses as much as digits as its factorization.

128910413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137934.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 128910413 is about 11353.8721588716. The cubic root of 128910413 is about 505.1604404771.

The spelling of 128910413 in words is "one hundred twenty-eight million, nine hundred ten thousand, four hundred thirteen".