86921179 has 4 divisors (see below), whose sum is σ = 89725120. Its totient is φ = 84117240.

The previous prime is 86921167. The next prime is 86921183. The reversal of 86921179 is 97112968.

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 86921179 - 2¹⁷ = 86790107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86931179) 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 3 ways as a sum of consecutive naturals, for example, 1401924 + ... + 1401985.

It is an arithmetic number, because the mean of its divisors is an integer number (22431280).

Almost surely, 2^86921179 is an apocalyptic number.

86921179 is a deficient number, since it is larger than the sum of its proper divisors (2803941).

86921179 is a wasteful number, since it uses less digits than its factorization.

86921179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803940.

The product of its digits is 54432, while the sum is 43.

The square root of 86921179 is about 9323.1528465428. The cubic root of 86921179 is about 442.9709057967.

The spelling of 86921179 in words is "eighty-six million, nine hundred twenty-one thousand, one hundred seventy-nine".