87561653 has 2 divisors, whose sum is σ = 87561654. Its totient is φ = 87561652.

The previous prime is 87561641. The next prime is 87561689. The reversal of 87561653 is 35616578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56280004 + 31281649 = 7502^2 + 5593^2 .

It is a cyclic number.

It is not a de Polignac number, because 87561653 - 2⁴ = 87561637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87561653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87561613) 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, 43780826 + 43780827.

It is an arithmetic number, because the mean of its divisors is an integer number (43780827).

Almost surely, 2^87561653 is an apocalyptic number.

It is an amenable number.

87561653 is a deficient number, since it is larger than the sum of its proper divisors (1).

87561653 is an equidigital number, since it uses as much as digits as its factorization.

87561653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 87561653 is about 9357.4383781033. The cubic root of 87561653 is about 444.0562467633.

The spelling of 87561653 in words is "eighty-seven million, five hundred sixty-one thousand, six hundred fifty-three".