87748559 has 2 divisors, whose sum is σ = 87748560. Its totient is φ = 87748558.

The previous prime is 87748553. The next prime is 87748567. The reversal of 87748559 is 95584778.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87748559 is a 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 87748559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87748553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43874279 + 43874280.

It is an arithmetic number, because the mean of its divisors is an integer number (43874280).

Almost surely, 2^87748559 is an apocalyptic number.

87748559 is a deficient number, since it is larger than the sum of its proper divisors (1).

87748559 is an equidigital number, since it uses as much as digits as its factorization.

87748559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2822400, while the sum is 53.

The square root of 87748559 is about 9367.4200823919. The cubic root of 87748559 is about 444.3719777938.

The spelling of 87748559 in words is "eighty-seven million, seven hundred forty-eight thousand, five hundred fifty-nine".