722239879 has 2 divisors, whose sum is σ = 722239880. Its totient is φ = 722239878.

The previous prime is 722239877. The next prime is 722239919. The reversal of 722239879 is 978932227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722239879 - 2¹ = 722239877 is a prime.

Together with 722239877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722239871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361119939 + 361119940.

It is an arithmetic number, because the mean of its divisors is an integer number (361119940).

Almost surely, 2^722239879 is an apocalyptic number.

722239879 is a deficient number, since it is larger than the sum of its proper divisors (1).

722239879 is an equidigital number, since it uses as much as digits as its factorization.

722239879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 722239879 is about 26874.5210003825. The cubic root of 722239879 is about 897.2094135080.

The spelling of 722239879 in words is "seven hundred twenty-two million, two hundred thirty-nine thousand, eight hundred seventy-nine".