839820673 has 2 divisors, whose sum is σ = 839820674. Its totient is φ = 839820672.

The previous prime is 839820661. The next prime is 839820703. The reversal of 839820673 is 376028938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617423104 + 222397569 = 24848^2 + 14913^2 .

It is a cyclic number.

It is not a de Polignac number, because 839820673 - 2¹³ = 839812481 is a prime.

It is not a weakly prime, because it can be changed into another prime (839820613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419910336 + 419910337.

It is an arithmetic number, because the mean of its divisors is an integer number (419910337).

Almost surely, 2^839820673 is an apocalyptic number.

It is an amenable number.

839820673 is a deficient number, since it is larger than the sum of its proper divisors (1).

839820673 is an equidigital number, since it uses as much as digits as its factorization.

839820673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 839820673 is about 28979.6596425838. The cubic root of 839820673 is about 943.4716476412.

The spelling of 839820673 in words is "eight hundred thirty-nine million, eight hundred twenty thousand, six hundred seventy-three".