85671587 has 2 divisors, whose sum is σ = 85671588. Its totient is φ = 85671586.

The previous prime is 85671581. The next prime is 85671637. The reversal of 85671587 is 78517658.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85671587 - 2¹⁶ = 85606051 is a prime.

It is not a weakly prime, because it can be changed into another prime (85671581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42835793 + 42835794.

It is an arithmetic number, because the mean of its divisors is an integer number (42835794).

Almost surely, 2^85671587 is an apocalyptic number.

85671587 is a deficient number, since it is larger than the sum of its proper divisors (1).

85671587 is an equidigital number, since it uses as much as digits as its factorization.

85671587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 47.

The square root of 85671587 is about 9255.8947163416. The cubic root of 85671587 is about 440.8379126084.

The spelling of 85671587 in words is "eighty-five million, six hundred seventy-one thousand, five hundred eighty-seven".