84473791889 has 2 divisors, whose sum is σ = 84473791890. Its totient is φ = 84473791888.

The previous prime is 84473791873. The next prime is 84473791951. The reversal of 84473791889 is 98819737448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82062196225 + 2411595664 = 286465^2 + 49108^2 .

It is a cyclic number.

It is not a de Polignac number, because 84473791889 - 2⁴ = 84473791873 is a prime.

It is a super-2 number, since 2×84473791889² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84473791289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42236895944 + 42236895945.

It is an arithmetic number, because the mean of its divisors is an integer number (42236895945).

Almost surely, 2^84473791889 is an apocalyptic number.

It is an amenable number.

84473791889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84473791889 is an equidigital number, since it uses as much as digits as its factorization.

84473791889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97542144, while the sum is 68.

The spelling of 84473791889 in words is "eighty-four billion, four hundred seventy-three million, seven hundred ninety-one thousand, eight hundred eighty-nine".