85630871 has 2 divisors, whose sum is σ = 85630872. Its totient is φ = 85630870.

The previous prime is 85630861. The next prime is 85630873. The reversal of 85630871 is 17803658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85630871 - 2¹⁰ = 85629847 is a prime.

Together with 85630873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85630873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42815435 + 42815436.

It is an arithmetic number, because the mean of its divisors is an integer number (42815436).

Almost surely, 2^85630871 is an apocalyptic number.

85630871 is a deficient number, since it is larger than the sum of its proper divisors (1).

85630871 is an equidigital number, since it uses as much as digits as its factorization.

85630871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 85630871 is about 9253.6949917317. The cubic root of 85630871 is about 440.7680644774.

The spelling of 85630871 in words is "eighty-five million, six hundred thirty thousand, eight hundred seventy-one".