87982789 has 2 divisors, whose sum is σ = 87982790. Its totient is φ = 87982788.

The previous prime is 87982771. The next prime is 87982793. The reversal of 87982789 is 98728978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81757764 + 6225025 = 9042^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 87982789 - 2⁵ = 87982757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87982709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43991394 + 43991395.

It is an arithmetic number, because the mean of its divisors is an integer number (43991395).

Almost surely, 2^87982789 is an apocalyptic number.

It is an amenable number.

87982789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87982789 is an equidigital number, since it uses as much as digits as its factorization.

87982789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 58.

The square root of 87982789 is about 9379.9141254065. The cubic root of 87982789 is about 444.7670185555.

The spelling of 87982789 in words is "eighty-seven million, nine hundred eighty-two thousand, seven hundred eighty-nine".