839428441 has 2 divisors, whose sum is σ = 839428442. Its totient is φ = 839428440.

The previous prime is 839428439. The next prime is 839428451. The reversal of 839428441 is 144824938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741418441 + 98010000 = 27229^2 + 9900^2 .

It is a cyclic number.

It is not a de Polignac number, because 839428441 - 2¹ = 839428439 is a prime.

Together with 839428439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (839428451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419714220 + 419714221.

It is an arithmetic number, because the mean of its divisors is an integer number (419714221).

Almost surely, 2^839428441 is an apocalyptic number.

It is an amenable number.

839428441 is a deficient number, since it is larger than the sum of its proper divisors (1).

839428441 is an equidigital number, since it uses as much as digits as its factorization.

839428441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 43.

The square root of 839428441 is about 28972.8914849726. The cubic root of 839428441 is about 943.3247442965.

The spelling of 839428441 in words is "eight hundred thirty-nine million, four hundred twenty-eight thousand, four hundred forty-one".