84555553 has 2 divisors, whose sum is σ = 84555554. Its totient is φ = 84555552.

The previous prime is 84555547. The next prime is 84555557. The reversal of 84555553 is 35555548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 39087504 = 6743^2 + 6252^2 .

It is a cyclic number.

It is not a de Polignac number, because 84555553 - 2⁹ = 84555041 is a prime.

It is not a weakly prime, because it can be changed into another prime (84555557) 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, 42277776 + 42277777.

It is an arithmetic number, because the mean of its divisors is an integer number (42277777).

Almost surely, 2^84555553 is an apocalyptic number.

It is an amenable number.

84555553 is a deficient number, since it is larger than the sum of its proper divisors (1).

84555553 is an equidigital number, since it uses as much as digits as its factorization.

84555553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300000, while the sum is 40.

The square root of 84555553 is about 9195.4093437976. The cubic root of 84555553 is about 438.9152912767.

The spelling of 84555553 in words is "eighty-four million, five hundred fifty-five thousand, five hundred fifty-three".