85813647 has 4 divisors (see below), whose sum is σ = 114418200. Its totient is φ = 57209096.

The previous prime is 85813643. The next prime is 85813657. The reversal of 85813647 is 74631858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85813647 - 2² = 85813643 is a prime.

It is a super-2 number, since 2×85813647² = 14727964022881218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85813599 and 85813608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85813643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14302272 + ... + 14302277.

It is an arithmetic number, because the mean of its divisors is an integer number (28604550).

Almost surely, 2^85813647 is an apocalyptic number.

85813647 is a deficient number, since it is larger than the sum of its proper divisors (28604553).

85813647 is a wasteful number, since it uses less digits than its factorization.

85813647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28604552.

The product of its digits is 161280, while the sum is 42.

The square root of 85813647 is about 9263.5655662385. The cubic root of 85813647 is about 441.0814427872.

The spelling of 85813647 in words is "eighty-five million, eight hundred thirteen thousand, six hundred forty-seven".