85709971 has 8 divisors (see below), whose sum is σ = 90904464. Its totient is φ = 80532480.

The previous prime is 85709933. The next prime is 85709989. The reversal of 85709971 is 17990758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85709971 - 2¹³ = 85701779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85700971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7011 + ... + 14851.

It is an arithmetic number, because the mean of its divisors is an integer number (11363058).

Almost surely, 2^85709971 is an apocalyptic number.

85709971 is a deficient number, since it is larger than the sum of its proper divisors (5194493).

85709971 is a wasteful number, since it uses less digits than its factorization.

85709971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 85709971 is about 9257.9679735890. The cubic root of 85709971 is about 440.9037399403.

The spelling of 85709971 in words is "eighty-five million, seven hundred nine thousand, nine hundred seventy-one".