86136981 has 8 divisors (see below), whose sum is σ = 131256384. Its totient is φ = 49221120.

The previous prime is 86136979. The next prime is 86136997. The reversal of 86136981 is 18963168.

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

It is not a de Polignac number, because 86136981 - 2¹ = 86136979 is a prime.

It is a super-2 number, since 2×86136981² = 14839158991588722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86136901) 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, 2050860 + ... + 2050901.

It is an arithmetic number, because the mean of its divisors is an integer number (16407048).

Almost surely, 2^86136981 is an apocalyptic number.

It is an amenable number.

86136981 is a deficient number, since it is larger than the sum of its proper divisors (45119403).

86136981 is a wasteful number, since it uses less digits than its factorization.

86136981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101771.

The product of its digits is 62208, while the sum is 42.

The square root of 86136981 is about 9281.0010774700. The cubic root of 86136981 is about 441.6347265063.

The spelling of 86136981 in words is "eighty-six million, one hundred thirty-six thousand, nine hundred eighty-one".