86723155 has 4 divisors (see below), whose sum is σ = 104067792. Its totient is φ = 69378520.

The previous prime is 86723149. The next prime is 86723167. The reversal of 86723155 is 55132768.

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

It is a de Polignac number, because none of the positive numbers 2^k-86723155 is a prime.

It is a super-2 number, since 2×86723155² = 15041811226308050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 8672311 + ... + 8672320.

It is an arithmetic number, because the mean of its divisors is an integer number (26016948).

Almost surely, 2^86723155 is an apocalyptic number.

86723155 is a deficient number, since it is larger than the sum of its proper divisors (17344637).

86723155 is a wasteful number, since it uses less digits than its factorization.

86723155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344636.

The product of its digits is 50400, while the sum is 37.

The square root of 86723155 is about 9312.5267784850. The cubic root of 86723155 is about 442.6342576216.

The spelling of 86723155 in words is "eighty-six million, seven hundred twenty-three thousand, one hundred fifty-five".