87171263 has 2 divisors, whose sum is σ = 87171264. Its totient is φ = 87171262.

The previous prime is 87171247. The next prime is 87171283. The reversal of 87171263 is 36217178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87171263 - 2⁴ = 87171247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87171233) 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, 43585631 + 43585632.

It is an arithmetic number, because the mean of its divisors is an integer number (43585632).

Almost surely, 2^87171263 is an apocalyptic number.

87171263 is a deficient number, since it is larger than the sum of its proper divisors (1).

87171263 is an equidigital number, since it uses as much as digits as its factorization.

87171263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 87171263 is about 9336.5551998582. Note that the first 3 decimals coincide. The cubic root of 87171263 is about 443.3953281059.

The spelling of 87171263 in words is "eighty-seven million, one hundred seventy-one thousand, two hundred sixty-three".