722291 has 2 divisors, whose sum is σ = 722292. Its totient is φ = 722290.

The previous prime is 722287. The next prime is 722299. The reversal of 722291 is 192227.

722291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722291 - 2² = 722287 is a prime.

It is not a weakly prime, because it can be changed into another prime (722299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361145 + 361146.

It is an arithmetic number, because the mean of its divisors is an integer number (361146).

2⁷²²²⁹¹ is an apocalyptic number.

722291 is a deficient number, since it is larger than the sum of its proper divisors (1).

722291 is an equidigital number, since it uses as much as digits as its factorization.

722291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 722291 is about 849.8770499313. The cubic root of 722291 is about 89.7230581526.

The spelling of 722291 in words is "seven hundred twenty-two thousand, two hundred ninety-one".