722721767 has 2 divisors, whose sum is σ = 722721768. Its totient is φ = 722721766.

The previous prime is 722721757. The next prime is 722721781. The reversal of 722721767 is 767127227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722721767 - 2⁴ = 722721751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722721707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361360883 + 361360884.

It is an arithmetic number, because the mean of its divisors is an integer number (361360884).

Almost surely, 2^722721767 is an apocalyptic number.

722721767 is a deficient number, since it is larger than the sum of its proper divisors (1).

722721767 is an equidigital number, since it uses as much as digits as its factorization.

722721767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115248, while the sum is 41.

The square root of 722721767 is about 26883.4850233373. The cubic root of 722721767 is about 897.4089124743.

The spelling of 722721767 in words is "seven hundred twenty-two million, seven hundred twenty-one thousand, seven hundred sixty-seven".