822379447 has 2 divisors, whose sum is σ = 822379448. Its totient is φ = 822379446.

The previous prime is 822379433. The next prime is 822379457. The reversal of 822379447 is 744973228.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-822379447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 822379397 and 822379406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822379457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411189723 + 411189724.

It is an arithmetic number, because the mean of its divisors is an integer number (411189724).

Almost surely, 2^822379447 is an apocalyptic number.

822379447 is a deficient number, since it is larger than the sum of its proper divisors (1).

822379447 is an equidigital number, since it uses as much as digits as its factorization.

822379447 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 822379447 is about 28677.1589771372. The cubic root of 822379447 is about 936.8946290778.

The spelling of 822379447 in words is "eight hundred twenty-two million, three hundred seventy-nine thousand, four hundred forty-seven".