87063181 has 2 divisors, whose sum is σ = 87063182. Its totient is φ = 87063180.

The previous prime is 87063169. The next prime is 87063203. The reversal of 87063181 is 18136078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 17089956 = 8365^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 87063181 - 2¹¹ = 87061133 is a prime.

It is a super-2 number, since 2×87063181² = 15159994971677522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87063101) 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, 43531590 + 43531591.

It is an arithmetic number, because the mean of its divisors is an integer number (43531591).

Almost surely, 2^87063181 is an apocalyptic number.

It is an amenable number.

87063181 is a deficient number, since it is larger than the sum of its proper divisors (1).

87063181 is an equidigital number, since it uses as much as digits as its factorization.

87063181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 87063181 is about 9330.7652955157. The cubic root of 87063181 is about 443.2119998233.

The spelling of 87063181 in words is "eighty-seven million, sixty-three thousand, one hundred eighty-one".