86387861 has 16 divisors (see below), whose sum is σ = 101756928. Its totient is φ = 71798400.

The previous prime is 86387803. The next prime is 86387869. The reversal of 86387861 is 16878368.

It is a cyclic number.

It is not a de Polignac number, because 86387861 - 2⁶ = 86387797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86387869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51116 + ... + 52778.

It is an arithmetic number, because the mean of its divisors is an integer number (6359808).

Almost surely, 2^86387861 is an apocalyptic number.

It is an amenable number.

86387861 is a deficient number, since it is larger than the sum of its proper divisors (15369067).

86387861 is a wasteful number, since it uses less digits than its factorization.

86387861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892.

The product of its digits is 387072, while the sum is 47.

The square root of 86387861 is about 9294.5070337270. The cubic root of 86387861 is about 442.0630749512.

The spelling of 86387861 in words is "eighty-six million, three hundred eighty-seven thousand, eight hundred sixty-one".