87518129 has 2 divisors, whose sum is σ = 87518130. Its totient is φ = 87518128.

The previous prime is 87518117. The next prime is 87518141. The reversal of 87518129 is 92181578.

It is a balanced prime because it is at equal distance from previous prime (87518117) and next prime (87518141).

It can be written as a sum of positive squares in only one way, i.e., 54051904 + 33466225 = 7352^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 87518129 - 2¹² = 87514033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87518729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43759064 + 43759065.

It is an arithmetic number, because the mean of its divisors is an integer number (43759065).

Almost surely, 2^87518129 is an apocalyptic number.

It is an amenable number.

87518129 is a deficient number, since it is larger than the sum of its proper divisors (1).

87518129 is an equidigital number, since it uses as much as digits as its factorization.

87518129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 41.

The square root of 87518129 is about 9355.1124525577. The cubic root of 87518129 is about 443.9826593477.

The spelling of 87518129 in words is "eighty-seven million, five hundred eighteen thousand, one hundred twenty-nine".