722446819 has 2 divisors, whose sum is σ = 722446820. Its totient is φ = 722446818.

The previous prime is 722446817. The next prime is 722446853. The reversal of 722446819 is 918644227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722446819 - 2¹ = 722446817 is a prime.

It is a super-2 number, since 2×722446819² = 1043858812566437522, which contains 22 as substring.

Together with 722446817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (722446817) 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, 361223409 + 361223410.

It is an arithmetic number, because the mean of its divisors is an integer number (361223410).

Almost surely, 2^722446819 is an apocalyptic number.

722446819 is a deficient number, since it is larger than the sum of its proper divisors (1).

722446819 is an equidigital number, since it uses as much as digits as its factorization.

722446819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 722446819 is about 26878.3708397663. The cubic root of 722446819 is about 897.2950963913.

The spelling of 722446819 in words is "seven hundred twenty-two million, four hundred forty-six thousand, eight hundred nineteen".