990222293 has 2 divisors, whose sum is σ = 990222294. Its totient is φ = 990222292.

The previous prime is 990222271. The next prime is 990222301. The reversal of 990222293 is 392222099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977312644 + 12909649 = 31262^2 + 3593^2 .

It is a cyclic number.

It is not a de Polignac number, because 990222293 - 2¹² = 990218197 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 (990222203) 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, 495111146 + 495111147.

It is an arithmetic number, because the mean of its divisors is an integer number (495111147).

Almost surely, 2^990222293 is an apocalyptic number.

It is an amenable number.

990222293 is a deficient number, since it is larger than the sum of its proper divisors (1).

990222293 is an equidigital number, since it uses as much as digits as its factorization.

990222293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 990222293 is about 31467.7977144890. The cubic root of 990222293 is about 996.7300836347.

The spelling of 990222293 in words is "nine hundred ninety million, two hundred twenty-two thousand, two hundred ninety-three".