87118847 has 2 divisors, whose sum is σ = 87118848. Its totient is φ = 87118846.

The previous prime is 87118789. The next prime is 87118879. The reversal of 87118847 is 74881178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87118847 - 2¹⁸ = 86856703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87118798 and 87118807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87118147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43559423 + 43559424.

It is an arithmetic number, because the mean of its divisors is an integer number (43559424).

Almost surely, 2^87118847 is an apocalyptic number.

87118847 is a deficient number, since it is larger than the sum of its proper divisors (1).

87118847 is an equidigital number, since it uses as much as digits as its factorization.

87118847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 44.

The square root of 87118847 is about 9333.7477467521. The cubic root of 87118847 is about 443.3064392200.

The spelling of 87118847 in words is "eighty-seven million, one hundred eighteen thousand, eight hundred forty-seven".