88564561 has 2 divisors, whose sum is σ = 88564562. Its totient is φ = 88564560.

The previous prime is 88564547. The next prime is 88564601. The reversal of 88564561 is 16546588.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47348161 + 41216400 = 6881^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 88564561 - 2⁷ = 88564433 is a prime.

It is not a weakly prime, because it can be changed into another prime (88564361) 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, 44282280 + 44282281.

It is an arithmetic number, because the mean of its divisors is an integer number (44282281).

Almost surely, 2^88564561 is an apocalyptic number.

It is an amenable number.

88564561 is a deficient number, since it is larger than the sum of its proper divisors (1).

88564561 is an equidigital number, since it uses as much as digits as its factorization.

88564561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 43.

The square root of 88564561 is about 9410.8746139772. The cubic root of 88564561 is about 445.7451824515.

The spelling of 88564561 in words is "eighty-eight million, five hundred sixty-four thousand, five hundred sixty-one".