839870149 has 2 divisors, whose sum is σ = 839870150. Its totient is φ = 839870148.

The previous prime is 839870113. The next prime is 839870153. The reversal of 839870149 is 941078938.

It is a happy number.

839870149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483340225 + 356529924 = 21985^2 + 18882^2 .

It is a cyclic number.

It is not a de Polignac number, because 839870149 - 2¹⁵ = 839837381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839870749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419935074 + 419935075.

It is an arithmetic number, because the mean of its divisors is an integer number (419935075).

Almost surely, 2^839870149 is an apocalyptic number.

It is an amenable number.

839870149 is a deficient number, since it is larger than the sum of its proper divisors (1).

839870149 is an equidigital number, since it uses as much as digits as its factorization.

839870149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 839870149 is about 28980.5132632257. The cubic root of 839870149 is about 943.4901747260.

The spelling of 839870149 in words is "eight hundred thirty-nine million, eight hundred seventy thousand, one hundred forty-nine".