87044563 has 2 divisors, whose sum is σ = 87044564. Its totient is φ = 87044562.

The previous prime is 87044549. The next prime is 87044663. The reversal of 87044563 is 36544078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87044563 - 2²⁵ = 53490131 is a prime.

It is not a weakly prime, because it can be changed into another prime (87044663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43522281 + 43522282.

It is an arithmetic number, because the mean of its divisors is an integer number (43522282).

Almost surely, 2^87044563 is an apocalyptic number.

87044563 is a deficient number, since it is larger than the sum of its proper divisors (1).

87044563 is an equidigital number, since it uses as much as digits as its factorization.

87044563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 87044563 is about 9329.7675748113. The cubic root of 87044563 is about 443.1804047251.

The spelling of 87044563 in words is "eighty-seven million, forty-four thousand, five hundred sixty-three".