87876109 has 2 divisors, whose sum is σ = 87876110. Its totient is φ = 87876108.

The previous prime is 87876091. The next prime is 87876143. The reversal of 87876109 is 90167878.

Together with previous prime (87876091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84824100 + 3052009 = 9210^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 87876109 - 2¹⁵ = 87843341 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87876199) 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, 43938054 + 43938055.

It is an arithmetic number, because the mean of its divisors is an integer number (43938055).

Almost surely, 2^87876109 is an apocalyptic number.

It is an amenable number.

87876109 is a deficient number, since it is larger than the sum of its proper divisors (1).

87876109 is an equidigital number, since it uses as much as digits as its factorization.

87876109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 87876109 is about 9374.2257813646. The cubic root of 87876109 is about 444.5871843858.

The spelling of 87876109 in words is "eighty-seven million, eight hundred seventy-six thousand, one hundred nine".