84439361771 has 2 divisors, whose sum is σ = 84439361772. Its totient is φ = 84439361770.

The previous prime is 84439361759. The next prime is 84439361837. The reversal of 84439361771 is 17716393448.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84439361771 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84439361701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42219680885 + 42219680886.

It is an arithmetic number, because the mean of its divisors is an integer number (42219680886).

Almost surely, 2^84439361771 is an apocalyptic number.

84439361771 is a deficient number, since it is larger than the sum of its proper divisors (1).

84439361771 is an equidigital number, since it uses as much as digits as its factorization.

84439361771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The spelling of 84439361771 in words is "eighty-four billion, four hundred thirty-nine million, three hundred sixty-one thousand, seven hundred seventy-one".