86906891 has 8 divisors (see below), whose sum is σ = 87757824. Its totient is φ = 86060520.

The previous prime is 86906887. The next prime is 86906927. The reversal of 86906891 is 19860968.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86906891 - 2² = 86906887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86906801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46130 + ... + 47976.

It is an arithmetic number, because the mean of its divisors is an integer number (10969728).

Almost surely, 2^86906891 is an apocalyptic number.

86906891 is a deficient number, since it is larger than the sum of its proper divisors (850933).

86906891 is a wasteful number, since it uses less digits than its factorization.

86906891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 86906891 is about 9322.3865506639. The cubic root of 86906891 is about 442.9466327898.

The spelling of 86906891 in words is "eighty-six million, nine hundred six thousand, eight hundred ninety-one".