722398447 has 2 divisors, whose sum is σ = 722398448. Its totient is φ = 722398446.

The previous prime is 722398367. The next prime is 722398451. The reversal of 722398447 is 744893227.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722398447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722398397 and 722398406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722398247) 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, 361199223 + 361199224.

It is an arithmetic number, because the mean of its divisors is an integer number (361199224).

Almost surely, 2^722398447 is an apocalyptic number.

722398447 is a deficient number, since it is larger than the sum of its proper divisors (1).

722398447 is an equidigital number, since it uses as much as digits as its factorization.

722398447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 722398447 is about 26877.4709933803. The cubic root of 722398447 is about 897.2750695760.

The spelling of 722398447 in words is "seven hundred twenty-two million, three hundred ninety-eight thousand, four hundred forty-seven".