810425839 has 6 divisors (see below), whose sum is σ = 836732256. Its totient is φ = 784129680.

The previous prime is 810425807. The next prime is 810425923. The reversal of 810425839 is 938524018.

It is not a de Polignac number, because 810425839 - 2⁵ = 810425807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810405839) 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 in 5 ways as a sum of consecutive naturals, for example, 155947 + ... + 161059.

It is an arithmetic number, because the mean of its divisors is an integer number (139455376).

Almost surely, 2^810425839 is an apocalyptic number.

810425839 is a deficient number, since it is larger than the sum of its proper divisors (26306417).

810425839 is an frugal number, since it uses more digits than its factorization.

810425839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10257 (or 5144 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 810425839 is about 28467.9791871499. The cubic root of 810425839 is about 932.3330788199. Note that the first 3 decimals are identical.

The spelling of 810425839 in words is "eight hundred ten million, four hundred twenty-five thousand, eight hundred thirty-nine".