87656563 has 2 divisors, whose sum is σ = 87656564. Its totient is φ = 87656562.

The previous prime is 87656537. The next prime is 87656579. The reversal of 87656563 is 36565678.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87656563 - 2¹³ = 87648371 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (87656533) 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, 43828281 + 43828282.

It is an arithmetic number, because the mean of its divisors is an integer number (43828282).

Almost surely, 2^87656563 is an apocalyptic number.

87656563 is a deficient number, since it is larger than the sum of its proper divisors (1).

87656563 is an equidigital number, since it uses as much as digits as its factorization.

87656563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 46.

The square root of 87656563 is about 9362.5083711578. The cubic root of 87656563 is about 444.2166296046.

The spelling of 87656563 in words is "eighty-seven million, six hundred fifty-six thousand, five hundred sixty-three".