86821723 has 8 divisors (see below), whose sum is σ = 89114256. Its totient is φ = 84537600.

The previous prime is 86821717. The next prime is 86821733. The reversal of 86821723 is 32712868.

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

It is a cyclic number.

It is not a de Polignac number, because 86821723 - 2⁹ = 86821211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86821733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22528 + ... + 26098.

It is an arithmetic number, because the mean of its divisors is an integer number (11139282).

Almost surely, 2^86821723 is an apocalyptic number.

86821723 is a deficient number, since it is larger than the sum of its proper divisors (2292533).

86821723 is a wasteful number, since it uses less digits than its factorization.

86821723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205.

The product of its digits is 32256, while the sum is 37.

The square root of 86821723 is about 9317.8175019690. The cubic root of 86821723 is about 442.8018908771.

The spelling of 86821723 in words is "eighty-six million, eight hundred twenty-one thousand, seven hundred twenty-three".