86956571 has 4 divisors (see below), whose sum is σ = 93645552. Its totient is φ = 80267592.

The previous prime is 86956543. The next prime is 86956631. The reversal of 86956571 is 17565968.

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 86956571 - 2¹⁴ = 86940187 is a prime.

It is a super-2 number, since 2×86956571² = 15122890480156082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86950571) 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, 3344471 + ... + 3344496.

It is an arithmetic number, because the mean of its divisors is an integer number (23411388).

Almost surely, 2^86956571 is an apocalyptic number.

86956571 is a deficient number, since it is larger than the sum of its proper divisors (6688981).

86956571 is a wasteful number, since it uses less digits than its factorization.

86956571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688980.

The product of its digits is 453600, while the sum is 47.

The square root of 86956571 is about 9325.0507237226. The cubic root of 86956571 is about 443.0310196420.

The spelling of 86956571 in words is "eighty-six million, nine hundred fifty-six thousand, five hundred seventy-one".