8722291 has 2 divisors, whose sum is σ = 8722292. Its totient is φ = 8722290.

The previous prime is 8722283. The next prime is 8722297. The reversal of 8722291 is 1922278.

8722291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8722291 - 2³ = 8722283 is a prime.

It is not a weakly prime, because it can be changed into another prime (8722297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4361145 + 4361146.

It is an arithmetic number, because the mean of its divisors is an integer number (4361146).

Almost surely, 2^8722291 is an apocalyptic number.

8722291 is a deficient number, since it is larger than the sum of its proper divisors (1).

8722291 is an equidigital number, since it uses as much as digits as its factorization.

8722291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 8722291 is about 2953.3525018189. The cubic root of 8722291 is about 205.8465174652.

The spelling of 8722291 in words is "eight million, seven hundred twenty-two thousand, two hundred ninety-one".