840588949 has 2 divisors, whose sum is σ = 840588950. Its totient is φ = 840588948.

The previous prime is 840588913. The next prime is 840588979. The reversal of 840588949 is 949885048.

840588949 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., 787924900 + 52664049 = 28070^2 + 7257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840588949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840588949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840588979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420294474 + 420294475.

It is an arithmetic number, because the mean of its divisors is an integer number (420294475).

Almost surely, 2^840588949 is an apocalyptic number.

It is an amenable number.

840588949 is a deficient number, since it is larger than the sum of its proper divisors (1).

840588949 is an equidigital number, since it uses as much as digits as its factorization.

840588949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The square root of 840588949 is about 28992.9120476023. The cubic root of 840588949 is about 943.7592589241.

The spelling of 840588949 in words is "eight hundred forty million, five hundred eighty-eight thousand, nine hundred forty-nine".