4448138129 has 2 divisors, whose sum is σ = 4448138130. Its totient is φ = 4448138128.

The previous prime is 4448138119. The next prime is 4448138131. The reversal of 4448138129 is 9218318444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4269969025 + 178169104 = 65345^2 + 13348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4448138129 is a prime.

Together with 4448138131, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4448138129.

It is not a weakly prime, because it can be changed into another prime (4448138119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224069064 + 2224069065.

It is an arithmetic number, because the mean of its divisors is an integer number (2224069065).

Almost surely, 2^4448138129 is an apocalyptic number.

It is an amenable number.

4448138129 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448138129 is an equidigital number, since it uses as much as digits as its factorization.

4448138129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 4448138129 is about 66694.3635474543. The cubic root of 4448138129 is about 1644.5967272404.

The spelling of 4448138129 in words is "four billion, four hundred forty-eight million, one hundred thirty-eight thousand, one hundred twenty-nine".