8722381 has 8 divisors (see below), whose sum is σ = 8983800. Its totient is φ = 8463360.

The previous prime is 8722367. The next prime is 8722391. The reversal of 8722381 is 1832278.

8722381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 8702500 = 141^2 + 2950^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8722381 is a prime.

It is a super-2 number, since 2×8722381² = 152159860618322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722331) 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, 8925 + ... + 9853.

It is an arithmetic number, because the mean of its divisors is an integer number (1122975).

Almost surely, 2^8722381 is an apocalyptic number.

It is an amenable number.

8722381 is a deficient number, since it is larger than the sum of its proper divisors (261419).

8722381 is a wasteful number, since it uses less digits than its factorization.

8722381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its digits is 5376, while the sum is 31.

The square root of 8722381 is about 2953.3677387010. The cubic root of 8722381 is about 205.8472254643.

The spelling of 8722381 in words is "eight million, seven hundred twenty-two thousand, three hundred eighty-one".