87168964789 has 2 divisors, whose sum is σ = 87168964790. Its totient is φ = 87168964788.

The previous prime is 87168964781. The next prime is 87168964811. The reversal of 87168964789 is 98746986178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77670903025 + 9498061764 = 278695^2 + 97458^2 .

It is a cyclic number.

It is not a de Polignac number, because 87168964789 - 2³ = 87168964781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87168964781) 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, 43584482394 + 43584482395.

It is an arithmetic number, because the mean of its divisors is an integer number (43584482395).

Almost surely, 2^87168964789 is an apocalyptic number.

It is an amenable number.

87168964789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87168964789 is an equidigital number, since it uses as much as digits as its factorization.

87168964789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 292626432, while the sum is 73.

The spelling of 87168964789 in words is "eighty-seven billion, one hundred sixty-eight million, nine hundred sixty-four thousand, seven hundred eighty-nine".