86849471 has 4 divisors (see below), whose sum is σ = 89196792. Its totient is φ = 84502152.

The previous prime is 86849459. The next prime is 86849473. The reversal of 86849471 is 17494868.

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 86849471 - 2⁶ = 86849407 is a prime.

It is a super-3 number, since 3×86849471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86849473) 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, 1173605 + ... + 1173678.

It is an arithmetic number, because the mean of its divisors is an integer number (22299198).

Almost surely, 2^86849471 is an apocalyptic number.

86849471 is a deficient number, since it is larger than the sum of its proper divisors (2347321).

86849471 is a wasteful number, since it uses less digits than its factorization.

86849471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347320.

The product of its digits is 387072, while the sum is 47.

The square root of 86849471 is about 9319.3063583080. The cubic root of 86849471 is about 442.8490586354.

The spelling of 86849471 in words is "eighty-six million, eight hundred forty-nine thousand, four hundred seventy-one".