839455121 has 6 divisors (see below), whose sum is σ = 891739830. Its totient is φ = 790075136.

The previous prime is 839455103. The next prime is 839455129. The reversal of 839455121 is 121554938.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 111534721 + 727920400 = 10561^2 + 26980^2 .

It is a de Polignac number, because none of the positive numbers 2^k-839455121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (839455129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1452056 + ... + 1452633.

It is an arithmetic number, because the mean of its divisors is an integer number (148623305).

Almost surely, 2^839455121 is an apocalyptic number.

It is an amenable number.

839455121 is a deficient number, since it is larger than the sum of its proper divisors (52284709).

839455121 is a wasteful number, since it uses less digits than its factorization.

839455121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904723 (or 2904706 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 839455121 is about 28973.3519117136. The cubic root of 839455121 is about 943.3347382544.

The spelling of 839455121 in words is "eight hundred thirty-nine million, four hundred fifty-five thousand, one hundred twenty-one".