42869989889 has 2 divisors, whose sum is σ = 42869989890. Its totient is φ = 42869989888.

The previous prime is 42869989873. The next prime is 42869989969. The reversal of 42869989889 is 98898996824.

It is an a-pointer prime, because the next prime (42869989969) can be obtained adding 42869989889 to its sum of digits (80).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41022451600 + 1847538289 = 202540^2 + 42983^2 .

It is a cyclic number.

It is not a de Polignac number, because 42869989889 - 2⁴ = 42869989873 is a prime.

It is not a weakly prime, because it can be changed into another prime (42869985889) 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, 21434994944 + 21434994945.

It is an arithmetic number, because the mean of its divisors is an integer number (21434994945).

Almost surely, 2^42869989889 is an apocalyptic number.

It is an amenable number.

42869989889 is a deficient number, since it is larger than the sum of its proper divisors (1).

42869989889 is an equidigital number, since it uses as much as digits as its factorization.

42869989889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1289945088, while the sum is 80.

The spelling of 42869989889 in words is "forty-two billion, eight hundred sixty-nine million, nine hundred eighty-nine thousand, eight hundred eighty-nine".