822147749 has 2 divisors, whose sum is σ = 822147750. Its totient is φ = 822147748.

The previous prime is 822147721. The next prime is 822147757. The reversal of 822147749 is 947741228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438693025 + 383454724 = 20945^2 + 19582^2 .

It is a cyclic number.

It is not a de Polignac number, because 822147749 - 2⁸ = 822147493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822147449) 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, 411073874 + 411073875.

It is an arithmetic number, because the mean of its divisors is an integer number (411073875).

Almost surely, 2^822147749 is an apocalyptic number.

It is an amenable number.

822147749 is a deficient number, since it is larger than the sum of its proper divisors (1).

822147749 is an equidigital number, since it uses as much as digits as its factorization.

822147749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 822147749 is about 28673.1189269671. The cubic root of 822147749 is about 936.8066336064.

The spelling of 822147749 in words is "eight hundred twenty-two million, one hundred forty-seven thousand, seven hundred forty-nine".