400222349 has 2 divisors, whose sum is σ = 400222350. Its totient is φ = 400222348.

The previous prime is 400222331. The next prime is 400222351. The reversal of 400222349 is 943222004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286117225 + 114105124 = 16915^2 + 10682^2 .

It is a cyclic number.

It is not a de Polignac number, because 400222349 - 2⁸ = 400222093 is a prime.

Together with 400222351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400222309) 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, 200111174 + 200111175.

It is an arithmetic number, because the mean of its divisors is an integer number (200111175).

Almost surely, 2^400222349 is an apocalyptic number.

It is an amenable number.

400222349 is a deficient number, since it is larger than the sum of its proper divisors (1).

400222349 is an equidigital number, since it uses as much as digits as its factorization.

400222349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 400222349 is about 20005.5579527290. The cubic root of 400222349 is about 736.9427978926.

The spelling of 400222349 in words is "four hundred million, two hundred twenty-two thousand, three hundred forty-nine".