85807971 has 16 divisors (see below), whose sum is σ = 133814400. Its totient is φ = 54194184.

The previous prime is 85807913. The next prime is 85807979. The reversal of 85807971 is 17970858.

It is not a de Polignac number, because 85807971 - 2⁹ = 85807459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85807979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83121 + ... + 84146.

It is an arithmetic number, because the mean of its divisors is an integer number (8363400).

Almost surely, 2^85807971 is an apocalyptic number.

85807971 is a deficient number, since it is larger than the sum of its proper divisors (48006429).

85807971 is a wasteful number, since it uses less digits than its factorization.

85807971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167295 (or 167289 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 85807971 is about 9263.2591996554. The cubic root of 85807971 is about 441.0717177083.

The spelling of 85807971 in words is "eighty-five million, eight hundred seven thousand, nine hundred seventy-one".