86187861 has 8 divisors (see below), whose sum is σ = 127685760. Its totient is φ = 57458556.

The previous prime is 86187859. The next prime is 86187887. The reversal of 86187861 is 16878168.

It is not a de Polignac number, because 86187861 - 2¹ = 86187859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86187821) 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, 1596045 + ... + 1596098.

It is an arithmetic number, because the mean of its divisors is an integer number (15960720).

Almost surely, 2^86187861 is an apocalyptic number.

It is an amenable number.

86187861 is a deficient number, since it is larger than the sum of its proper divisors (41497899).

86187861 is a wasteful number, since it uses less digits than its factorization.

86187861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192152 (or 3192146 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 86187861 is about 9283.7417564256. The cubic root of 86187861 is about 441.7216653633.

The spelling of 86187861 in words is "eighty-six million, one hundred eighty-seven thousand, eight hundred sixty-one".