84553999 has 2 divisors, whose sum is σ = 84554000. Its totient is φ = 84553998.

The previous prime is 84553993. The next prime is 84554023. The reversal of 84553999 is 99935548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84553999 - 2¹³ = 84545807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84553993) 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, 42276999 + 42277000.

It is an arithmetic number, because the mean of its divisors is an integer number (42277000).

Almost surely, 2^84553999 is an apocalyptic number.

84553999 is a deficient number, since it is larger than the sum of its proper divisors (1).

84553999 is an equidigital number, since it uses as much as digits as its factorization.

84553999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 52.

The square root of 84553999 is about 9195.3248447241. The cubic root of 84553999 is about 438.9126023993.

The spelling of 84553999 in words is "eighty-four million, five hundred fifty-three thousand, nine hundred ninety-nine".