722609879 has 2 divisors, whose sum is σ = 722609880. Its totient is φ = 722609878.

The previous prime is 722609861. The next prime is 722609887. The reversal of 722609879 is 978906227.

It is a happy number.

722609879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722609879 - 2²⁰ = 721561303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722609179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361304939 + 361304940.

It is an arithmetic number, because the mean of its divisors is an integer number (361304940).

Almost surely, 2^722609879 is an apocalyptic number.

722609879 is a deficient number, since it is larger than the sum of its proper divisors (1).

722609879 is an equidigital number, since it uses as much as digits as its factorization.

722609879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 722609879 is about 26881.4039625909. The cubic root of 722609879 is about 897.3625993678.

The spelling of 722609879 in words is "seven hundred twenty-two million, six hundred nine thousand, eight hundred seventy-nine".