87660563 has 2 divisors, whose sum is σ = 87660564. Its totient is φ = 87660562.

The previous prime is 87660527. The next prime is 87660571. The reversal of 87660563 is 36506678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87660563 - 2¹² = 87656467 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87660563.

It is not a weakly prime, because it can be changed into another prime (87660163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43830281 + 43830282.

It is an arithmetic number, because the mean of its divisors is an integer number (43830282).

Almost surely, 2^87660563 is an apocalyptic number.

87660563 is a deficient number, since it is larger than the sum of its proper divisors (1).

87660563 is an equidigital number, since it uses as much as digits as its factorization.

87660563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 87660563 is about 9362.7219866874. The cubic root of 87660563 is about 444.2233864271.

The spelling of 87660563 in words is "eighty-seven million, six hundred sixty thousand, five hundred sixty-three".