84473902991 has 2 divisors, whose sum is σ = 84473902992. Its totient is φ = 84473902990.

The previous prime is 84473902943. The next prime is 84473903053. The reversal of 84473902991 is 19920937448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84473902991 - 2⁶ = 84473902927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84473902091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42236951495 + 42236951496.

It is an arithmetic number, because the mean of its divisors is an integer number (42236951496).

Almost surely, 2^84473902991 is an apocalyptic number.

84473902991 is a deficient number, since it is larger than the sum of its proper divisors (1).

84473902991 is an equidigital number, since it uses as much as digits as its factorization.

84473902991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 84473902991 in words is "eighty-four billion, four hundred seventy-three million, nine hundred two thousand, nine hundred ninety-one".