86149979 has 4 divisors (see below), whose sum is σ = 88251240. Its totient is φ = 84048720.

The previous prime is 86149967. The next prime is 86149997. The reversal of 86149979 is 97994168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86149979 - 2¹² = 86145883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86149979.

It is not an unprimeable number, because it can be changed into a prime (86149079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050569 + ... + 1050650.

It is an arithmetic number, because the mean of its divisors is an integer number (22062810).

Almost surely, 2^86149979 is an apocalyptic number.

86149979 is a deficient number, since it is larger than the sum of its proper divisors (2101261).

86149979 is a wasteful number, since it uses less digits than its factorization.

86149979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101260.

The product of its digits is 979776, while the sum is 53.

The square root of 86149979 is about 9281.7012987922. The cubic root of 86149979 is about 441.6569394954.

The spelling of 86149979 in words is "eighty-six million, one hundred forty-nine thousand, nine hundred seventy-nine".