8278723 has 4 divisors (see below), whose sum is σ = 8314488. Its totient is φ = 8242960.

The previous prime is 8278709. The next prime is 8278729. The reversal of 8278723 is 3278728.

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 8278723 - 2⁹ = 8278211 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8278729) 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, 17533 + ... + 17998.

It is an arithmetic number, because the mean of its divisors is an integer number (2078622).

Almost surely, 2^8278723 is an apocalyptic number.

8278723 is a deficient number, since it is larger than the sum of its proper divisors (35765).

8278723 is a wasteful number, since it uses less digits than its factorization.

8278723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35764.

The product of its digits is 37632, while the sum is 37.

The square root of 8278723 is about 2877.2770113425. The cubic root of 8278723 is about 202.2962274701.

The spelling of 8278723 in words is "eight million, two hundred seventy-eight thousand, seven hundred twenty-three".