87489071 has 2 divisors, whose sum is σ = 87489072. Its totient is φ = 87489070.

The previous prime is 87489049. The next prime is 87489097. The reversal of 87489071 is 17098478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87489071 - 2¹⁰ = 87488047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87489371) 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, 43744535 + 43744536.

It is an arithmetic number, because the mean of its divisors is an integer number (43744536).

Almost surely, 2^87489071 is an apocalyptic number.

87489071 is a deficient number, since it is larger than the sum of its proper divisors (1).

87489071 is an equidigital number, since it uses as much as digits as its factorization.

87489071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 87489071 is about 9353.5592690697. The cubic root of 87489071 is about 443.9335164772.

The spelling of 87489071 in words is "eighty-seven million, four hundred eighty-nine thousand, seventy-one".