722139263 has 2 divisors, whose sum is σ = 722139264. Its totient is φ = 722139262.

The previous prime is 722139247. The next prime is 722139293. The reversal of 722139263 is 362931227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722139263 - 2⁴ = 722139247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722139233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361069631 + 361069632.

It is an arithmetic number, because the mean of its divisors is an integer number (361069632).

Almost surely, 2^722139263 is an apocalyptic number.

722139263 is a deficient number, since it is larger than the sum of its proper divisors (1).

722139263 is an equidigital number, since it uses as much as digits as its factorization.

722139263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 722139263 is about 26872.6489762360. The cubic root of 722139263 is about 897.1677478429.

The spelling of 722139263 in words is "seven hundred twenty-two million, one hundred thirty-nine thousand, two hundred sixty-three".