838544121 has 6 divisors (see below), whose sum is σ = 1211230410. Its totient is φ = 559029408.

The previous prime is 838544107. The next prime is 838544131. The reversal of 838544121 is 121445838.

It can be written as a sum of positive squares in only one way, i.e., 810028521 + 28515600 = 28461^2 + 5340^2 .

It is not a de Polignac number, because 838544121 - 2⁵ = 838544089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (838544131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46585776 + ... + 46585793.

It is an arithmetic number, because the mean of its divisors is an integer number (201871735).

Almost surely, 2^838544121 is an apocalyptic number.

It is an amenable number.

838544121 is a deficient number, since it is larger than the sum of its proper divisors (372686289).

838544121 is a wasteful number, since it uses less digits than its factorization.

838544121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93171575 (or 93171572 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 838544121 is about 28957.6263012009. The cubic root of 838544121 is about 942.9933703892.

Adding to 838544121 its reverse (121445838), we get a palindrome (959989959).

The spelling of 838544121 in words is "eight hundred thirty-eight million, five hundred forty-four thousand, one hundred twenty-one".