722287 has 2 divisors, whose sum is σ = 722288. Its totient is φ = 722286.

The previous prime is 722273. The next prime is 722291. The reversal of 722287 is 782227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722287 - 2⁷ = 722159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722237) 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, 361143 + 361144.

It is an arithmetic number, because the mean of its divisors is an integer number (361144).

2⁷²²²⁸⁷ is an apocalyptic number.

722287 is a deficient number, since it is larger than the sum of its proper divisors (1).

722287 is an equidigital number, since it uses as much as digits as its factorization.

722287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 28.

The square root of 722287 is about 849.8746966465. The cubic root of 722287 is about 89.7228925255.

The spelling of 722287 in words is "seven hundred twenty-two thousand, two hundred eighty-seven".