86943531 has 8 divisors (see below), whose sum is σ = 116565904. Its totient is φ = 57641760.

The previous prime is 86943517. The next prime is 86943533. The reversal of 86943531 is 13534968.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86943531 - 2¹¹ = 86941483 is a prime.

It is a super-2 number, since 2×86943531² = 15118355165495922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86943531.

It is not an unprimeable number, because it can be changed into a prime (86943533) 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, 79516 + ... + 80601.

It is an arithmetic number, because the mean of its divisors is an integer number (14570738).

Almost surely, 2^86943531 is an apocalyptic number.

86943531 is a deficient number, since it is larger than the sum of its proper divisors (29622373).

86943531 is a wasteful number, since it uses less digits than its factorization.

86943531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160301.

The product of its digits is 77760, while the sum is 39.

The square root of 86943531 is about 9324.3515056008. The cubic root of 86943531 is about 443.0088729036.

The spelling of 86943531 in words is "eighty-six million, nine hundred forty-three thousand, five hundred thirty-one".