839949101 has 2 divisors, whose sum is σ = 839949102. Its totient is φ = 839949100.

The previous prime is 839949067. The next prime is 839949139. The reversal of 839949101 is 101949938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497736100 + 342213001 = 22310^2 + 18499^2 .

It is a cyclic number.

It is not a de Polignac number, because 839949101 - 2²² = 835754797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839949181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419974550 + 419974551.

It is an arithmetic number, because the mean of its divisors is an integer number (419974551).

Almost surely, 2^839949101 is an apocalyptic number.

It is an amenable number.

839949101 is a deficient number, since it is larger than the sum of its proper divisors (1).

839949101 is an equidigital number, since it uses as much as digits as its factorization.

839949101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 839949101 is about 28981.8753879041. The cubic root of 839949101 is about 943.5197380668.

The spelling of 839949101 in words is "eight hundred thirty-nine million, nine hundred forty-nine thousand, one hundred one".