86931147 has 4 divisors (see below), whose sum is σ = 115908200. Its totient is φ = 57954096.

The previous prime is 86931139. The next prime is 86931151. The reversal of 86931147 is 74113968.

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

It is not a de Polignac number, because 86931147 - 2³ = 86931139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86931107) 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, 14488522 + ... + 14488527.

It is an arithmetic number, because the mean of its divisors is an integer number (28977050).

Almost surely, 2^86931147 is an apocalyptic number.

86931147 is a deficient number, since it is larger than the sum of its proper divisors (28977053).

86931147 is a wasteful number, since it uses less digits than its factorization.

86931147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28977052.

The product of its digits is 36288, while the sum is 39.

The square root of 86931147 is about 9323.6874143227. The cubic root of 86931147 is about 442.9878382453.

It can be divided in two parts, 86931 and 147, that added together give a palindrome (87078).

The spelling of 86931147 in words is "eighty-six million, nine hundred thirty-one thousand, one hundred forty-seven".