87618323789 has 2 divisors, whose sum is σ = 87618323790. Its totient is φ = 87618323788.

The previous prime is 87618323777. The next prime is 87618323839. The reversal of 87618323789 is 98732381678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87103487689 + 514836100 = 295133^2 + 22690^2 .

It is a cyclic number.

It is not a de Polignac number, because 87618323789 - 2¹⁶ = 87618258253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87618323719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43809161894 + 43809161895.

It is an arithmetic number, because the mean of its divisors is an integer number (43809161895).

Almost surely, 2^87618323789 is an apocalyptic number.

It is an amenable number.

87618323789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87618323789 is an equidigital number, since it uses as much as digits as its factorization.

87618323789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 62.

The spelling of 87618323789 in words is "eighty-seven billion, six hundred eighteen million, three hundred twenty-three thousand, seven hundred eighty-nine".