87205553 has 2 divisors, whose sum is σ = 87205554. Its totient is φ = 87205552.

The previous prime is 87205507. The next prime is 87205561. The reversal of 87205553 is 35550278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76597504 + 10608049 = 8752^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 87205553 - 2¹⁰ = 87204529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87205583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43602776 + 43602777.

It is an arithmetic number, because the mean of its divisors is an integer number (43602777).

Almost surely, 2^87205553 is an apocalyptic number.

It is an amenable number.

87205553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87205553 is an equidigital number, since it uses as much as digits as its factorization.

87205553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 87205553 is about 9338.3913496919. The cubic root of 87205553 is about 443.4534590088.

The spelling of 87205553 in words is "eighty-seven million, two hundred five thousand, five hundred fifty-three".