869400554847589 has 2 divisors, whose sum is σ = 869400554847590. Its totient is φ = 869400554847588.

The previous prime is 869400554847581. The next prime is 869400554847641. The reversal of 869400554847589 is 985748455004968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747292706589025 + 122107848258564 = 27336655^2 + 11050242^2 .

It is a cyclic number.

It is not a de Polignac number, because 869400554847589 - 2³ = 869400554847581 is a prime.

It is a super-2 number, since 2×869400554847589² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869400554847581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434700277423794 + 434700277423795.

It is an arithmetic number, because the mean of its divisors is an integer number (434700277423795).

Almost surely, 2^{869400554847589} is an apocalyptic number.

It is an amenable number.

869400554847589 is a deficient number, since it is larger than the sum of its proper divisors (1).

869400554847589 is an equidigital number, since it uses as much as digits as its factorization.

869400554847589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592000, while the sum is 82.

The spelling of 869400554847589 in words is "eight hundred sixty-nine trillion, four hundred billion, five hundred fifty-four million, eight hundred forty-seven thousand, five hundred eighty-nine".