87255187 has 2 divisors, whose sum is σ = 87255188. Its totient is φ = 87255186.

The previous prime is 87255167. The next prime is 87255191. The reversal of 87255187 is 78155278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87255187 - 2¹⁵ = 87222419 is a prime.

It is a super-2 number, since 2×87255187² = 15226935316809938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87255167) 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, 43627593 + 43627594.

It is an arithmetic number, because the mean of its divisors is an integer number (43627594).

Almost surely, 2^87255187 is an apocalyptic number.

87255187 is a deficient number, since it is larger than the sum of its proper divisors (1).

87255187 is an equidigital number, since it uses as much as digits as its factorization.

87255187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 43.

The square root of 87255187 is about 9341.0484957525. The cubic root of 87255187 is about 443.5375751907.

Subtracting from 87255187 its reverse (78155278), we obtain a palindrome (9099909).

The spelling of 87255187 in words is "eighty-seven million, two hundred fifty-five thousand, one hundred eighty-seven".