1243222229 has 2 divisors, whose sum is σ = 1243222230. Its totient is φ = 1243222228.

The previous prime is 1243222207. The next prime is 1243222249. The reversal of 1243222229 is 9222223421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1212641329 + 30580900 = 34823^2 + 5530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243222229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243222249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621611114 + 621611115.

It is an arithmetic number, because the mean of its divisors is an integer number (621611115).

Almost surely, 2^1243222229 is an apocalyptic number.

It is an amenable number.

1243222229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243222229 is an equidigital number, since it uses as much as digits as its factorization.

1243222229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 1243222229 is about 35259.3566163650. The cubic root of 1243222229 is about 1075.2668467533.

The spelling of 1243222229 in words is "one billion, two hundred forty-three million, two hundred twenty-two thousand, two hundred twenty-nine".