86890191 has 8 divisors (see below), whose sum is σ = 116272944. Its totient is φ = 57717120.

The previous prime is 86890189. The next prime is 86890231. The reversal of 86890191 is 19109868.

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

It is not a de Polignac number, because 86890191 - 2¹ = 86890189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86890891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51450 + ... + 53111.

It is an arithmetic number, because the mean of its divisors is an integer number (14534118).

Almost surely, 2^86890191 is an apocalyptic number.

86890191 is a deficient number, since it is larger than the sum of its proper divisors (29382753).

86890191 is a wasteful number, since it uses less digits than its factorization.

86890191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104841.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 86890191 is about 9321.4908142421. The cubic root of 86890191 is about 442.9182588118.

The spelling of 86890191 in words is "eighty-six million, eight hundred ninety thousand, one hundred ninety-one".