722787239 has 2 divisors, whose sum is σ = 722787240. Its totient is φ = 722787238.

The previous prime is 722787199. The next prime is 722787269. The reversal of 722787239 is 932787227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722787239 - 2²⁴ = 706010023 is a prime.

It is a super-2 number, since 2×722787239² = 1044842785722486242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 722787193 and 722787202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722787269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361393619 + 361393620.

It is an arithmetic number, because the mean of its divisors is an integer number (361393620).

Almost surely, 2^722787239 is an apocalyptic number.

722787239 is a deficient number, since it is larger than the sum of its proper divisors (1).

722787239 is an equidigital number, since it uses as much as digits as its factorization.

722787239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 722787239 is about 26884.7026950271. The cubic root of 722787239 is about 897.4360106767.

The spelling of 722787239 in words is "seven hundred twenty-two million, seven hundred eighty-seven thousand, two hundred thirty-nine".