86158791 has 6 divisors (see below), whose sum is σ = 124451600. Its totient is φ = 57439188.

The previous prime is 86158789. The next prime is 86158801. The reversal of 86158791 is 19785168.

86158791 is a `hidden beast` number, since 8 + 61 + 587 + 9 + 1 = 666.

It is not a de Polignac number, because 86158791 - 2¹ = 86158789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86158741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4786591 + ... + 4786608.

Almost surely, 2^86158791 is an apocalyptic number.

86158791 is a deficient number, since it is larger than the sum of its proper divisors (38292809).

86158791 is a wasteful number, since it uses less digits than its factorization.

86158791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9573205 (or 9573202 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 86158791 is about 9282.1759841106. The cubic root of 86158791 is about 441.6719975307.

The spelling of 86158791 in words is "eighty-six million, one hundred fifty-eight thousand, seven hundred ninety-one".