85813471 has 8 divisors (see below), whose sum is σ = 89342864. Its totient is φ = 82347840.

The previous prime is 85813379. The next prime is 85813537. The reversal of 85813471 is 17431858.

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 85813471 - 2²³ = 77424863 is a prime.

It is a super-3 number, since 3×85813471³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 85813471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85813571) 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, 13185 + ... + 18586.

It is an arithmetic number, because the mean of its divisors is an integer number (11167858).

Almost surely, 2^85813471 is an apocalyptic number.

85813471 is a deficient number, since it is larger than the sum of its proper divisors (3529393).

85813471 is a wasteful number, since it uses less digits than its factorization.

85813471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31881.

The product of its digits is 26880, while the sum is 37.

The square root of 85813471 is about 9263.5560666517. The cubic root of 85813471 is about 441.0811412408.

The spelling of 85813471 in words is "eighty-five million, eight hundred thirteen thousand, four hundred seventy-one".