87654563 has 2 divisors, whose sum is σ = 87654564. Its totient is φ = 87654562.

The previous prime is 87654551. The next prime is 87654569. The reversal of 87654563 is 36545678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87654563 - 2⁴ = 87654547 is a prime.

It is a Chen 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 (87654569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43827281 + 43827282.

It is an arithmetic number, because the mean of its divisors is an integer number (43827282).

Almost surely, 2^87654563 is an apocalyptic number.

87654563 is a deficient number, since it is larger than the sum of its proper divisors (1).

87654563 is an equidigital number, since it uses as much as digits as its factorization.

87654563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The square root of 87654563 is about 9362.4015615653. The cubic root of 87654563 is about 444.2132511164.

The spelling of 87654563 in words is "eighty-seven million, six hundred fifty-four thousand, five hundred sixty-three".