84987473 has 2 divisors, whose sum is σ = 84987474. Its totient is φ = 84987472.

The previous prime is 84987407. The next prime is 84987491. The reversal of 84987473 is 37478948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80694289 + 4293184 = 8983^2 + 2072^2 .

It is a cyclic number.

It is not a de Polignac number, because 84987473 - 2¹² = 84983377 is a prime.

It is not a weakly prime, because it can be changed into another prime (84987373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42493736 + 42493737.

It is an arithmetic number, because the mean of its divisors is an integer number (42493737).

Almost surely, 2^84987473 is an apocalyptic number.

It is an amenable number.

84987473 is a deficient number, since it is larger than the sum of its proper divisors (1).

84987473 is an equidigital number, since it uses as much as digits as its factorization.

84987473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The square root of 84987473 is about 9218.8650602989. The cubic root of 84987473 is about 439.6613665133.

The spelling of 84987473 in words is "eighty-four million, nine hundred eighty-seven thousand, four hundred seventy-three".