86531147 has 4 divisors (see below), whose sum is σ = 86619456. Its totient is φ = 86442840.

The previous prime is 86531143. The next prime is 86531161. The reversal of 86531147 is 74113568.

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 86531147 - 2² = 86531143 is a prime.

It is a super-2 number, since 2×86531147² = 14975278802271218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86531141) 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, 42668 + ... + 44649.

It is an arithmetic number, because the mean of its divisors is an integer number (21654864).

Almost surely, 2^86531147 is an apocalyptic number.

86531147 is a deficient number, since it is larger than the sum of its proper divisors (88309).

86531147 is an equidigital number, since it uses as much as digits as its factorization.

86531147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88308.

The product of its digits is 20160, while the sum is 35.

The square root of 86531147 is about 9302.2119412535. The cubic root of 86531147 is about 442.3073471639.

The spelling of 86531147 in words is "eighty-six million, five hundred thirty-one thousand, one hundred forty-seven".