840356089 has 2 divisors, whose sum is σ = 840356090. Its totient is φ = 840356088.

The previous prime is 840356059. The next prime is 840356093. The reversal of 840356089 is 980653048.

840356089 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., 837523600 + 2832489 = 28940^2 + 1683^2 .

It is a cyclic number.

It is not a de Polignac number, because 840356089 - 2¹¹ = 840354041 is a prime.

It is not a weakly prime, because it can be changed into another prime (840356059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420178044 + 420178045.

It is an arithmetic number, because the mean of its divisors is an integer number (420178045).

Almost surely, 2^840356089 is an apocalyptic number.

It is an amenable number.

840356089 is a deficient number, since it is larger than the sum of its proper divisors (1).

840356089 is an equidigital number, since it uses as much as digits as its factorization.

840356089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 840356089 is about 28988.8959603501. The cubic root of 840356089 is about 943.6721041273.

The spelling of 840356089 in words is "eight hundred forty million, three hundred fifty-six thousand, eighty-nine".