9987877 has 2 divisors, whose sum is σ = 9987878. Its totient is φ = 9987876.

The previous prime is 9987853. The next prime is 9987881. The reversal of 9987877 is 7787899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7431076 + 2556801 = 2726^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 9987877 - 2¹⁹ = 9463589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993938 + 4993939.

It is an arithmetic number, because the mean of its divisors is an integer number (4993939).

Almost surely, 2^9987877 is an apocalyptic number.

It is an amenable number.

9987877 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987877 is an equidigital number, since it uses as much as digits as its factorization.

9987877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 55.

The square root of 9987877 is about 3160.3602642737. The cubic root of 9987877 is about 215.3563730924.

The spelling of 9987877 in words is "nine million, nine hundred eighty-seven thousand, eight hundred seventy-seven".