87768589 has 2 divisors, whose sum is σ = 87768590. Its totient is φ = 87768588.

The previous prime is 87768539. The next prime is 87768613. The reversal of 87768589 is 98586778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 3771364 = 9165^2 + 1942^2 .

It is a cyclic number.

It is not a de Polignac number, because 87768589 - 2⁹ = 87768077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87768509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43884294 + 43884295.

It is an arithmetic number, because the mean of its divisors is an integer number (43884295).

Almost surely, 2^87768589 is an apocalyptic number.

It is an amenable number.

87768589 is a deficient number, since it is larger than the sum of its proper divisors (1).

87768589 is an equidigital number, since it uses as much as digits as its factorization.

87768589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 58.

The square root of 87768589 is about 9368.4891524728. The cubic root of 87768589 is about 444.4057868715.

The spelling of 87768589 in words is "eighty-seven million, seven hundred sixty-eight thousand, five hundred eighty-nine".