8728331 has 2 divisors, whose sum is σ = 8728332. Its totient is φ = 8728330.

The previous prime is 8728309. The next prime is 8728373. The reversal of 8728331 is 1338278.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8728331 is a prime.

It is a super-2 number, since 2×8728331² = 152367524091122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is equal to p₅₈₅₅₀₉ and since 8728331 and 585509 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8728381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364165 + 4364166.

It is an arithmetic number, because the mean of its divisors is an integer number (4364166).

Almost surely, 2^8728331 is an apocalyptic number.

8728331 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728331 is an equidigital number, since it uses as much as digits as its factorization.

8728331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 8728331 is about 2954.3748915803. The cubic root of 8728331 is about 205.8940212723.

The spelling of 8728331 in words is "eight million, seven hundred twenty-eight thousand, three hundred thirty-one".