85891771 has 8 divisors (see below), whose sum is σ = 98237664. Its totient is φ = 73564800.

The previous prime is 85891759. The next prime is 85891781. The reversal of 85891771 is 17719858.

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 85891771 - 2¹¹ = 85889723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85891711) 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, 6921 + ... + 14821.

It is an arithmetic number, because the mean of its divisors is an integer number (12279708).

Almost surely, 2^85891771 is an apocalyptic number.

85891771 is a deficient number, since it is larger than the sum of its proper divisors (12345893).

85891771 is a wasteful number, since it uses less digits than its factorization.

85891771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461.

The product of its digits is 141120, while the sum is 46.

The square root of 85891771 is about 9267.7813418315. The cubic root of 85891771 is about 441.2152544285.

It can be divided in two parts, 858 and 91771, that added together give a palindrome (92629).

The spelling of 85891771 in words is "eighty-five million, eight hundred ninety-one thousand, seven hundred seventy-one".