825738839 has 2 divisors, whose sum is σ = 825738840. Its totient is φ = 825738838.

The previous prime is 825738829. The next prime is 825738869. The reversal of 825738839 is 938837528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825738839 - 2¹² = 825734743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825738829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412869419 + 412869420.

It is an arithmetic number, because the mean of its divisors is an integer number (412869420).

Almost surely, 2^825738839 is an apocalyptic number.

825738839 is a deficient number, since it is larger than the sum of its proper divisors (1).

825738839 is an equidigital number, since it uses as much as digits as its factorization.

825738839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The square root of 825738839 is about 28735.6718905266. The cubic root of 825738839 is about 938.1686234462.

The spelling of 825738839 in words is "eight hundred twenty-five million, seven hundred thirty-eight thousand, eight hundred thirty-nine".