8722749 has 16 divisors (see below), whose sum is σ = 13721600. Its totient is φ = 4823280.

The previous prime is 8722739. The next prime is 8722757. The reversal of 8722749 is 9472278.

It is not a de Polignac number, because 8722749 - 2⁷ = 8722621 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722739) 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 in 15 ways as a sum of consecutive naturals, for example, 6049 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (857600).

Almost surely, 2^8722749 is an apocalyptic number.

It is an amenable number.

8722749 is a deficient number, since it is larger than the sum of its proper divisors (4998851).

8722749 is a wasteful number, since it uses less digits than its factorization.

8722749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440.

The product of its digits is 56448, while the sum is 39.

The square root of 8722749 is about 2953.4300398012. The cubic root of 8722749 is about 205.8501203433.

The spelling of 8722749 in words is "eight million, seven hundred twenty-two thousand, seven hundred forty-nine".