87105287 has 2 divisors, whose sum is σ = 87105288. Its totient is φ = 87105286.

The previous prime is 87105233. The next prime is 87105371. The reversal of 87105287 is 78250178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87105287 - 2¹⁸ = 86843143 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87105287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87105587) 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, 43552643 + 43552644.

It is an arithmetic number, because the mean of its divisors is an integer number (43552644).

Almost surely, 2^87105287 is an apocalyptic number.

87105287 is a deficient number, since it is larger than the sum of its proper divisors (1).

87105287 is an equidigital number, since it uses as much as digits as its factorization.

87105287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 87105287 is about 9333.0213221657. The cubic root of 87105287 is about 443.2834378932.

The spelling of 87105287 in words is "eighty-seven million, one hundred five thousand, two hundred eighty-seven".