1426223209 has 2 divisors, whose sum is σ = 1426223210. Its totient is φ = 1426223208.

The previous prime is 1426223191. The next prime is 1426223251. The reversal of 1426223209 is 9023226241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315657984 + 110565225 = 36272^2 + 10515^2 .

It is an emirp because it is prime and its reverse (9023226241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1426223209 - 2¹⁷ = 1426092137 is a prime.

It is a super-2 number, since 2×1426223209² = 4068225283780515362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1426223609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713111604 + 713111605.

It is an arithmetic number, because the mean of its divisors is an integer number (713111605).

Almost surely, 2^1426223209 is an apocalyptic number.

It is an amenable number.

1426223209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1426223209 is an equidigital number, since it uses as much as digits as its factorization.

1426223209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1426223209 is about 37765.3704999699. The cubic root of 1426223209 is about 1125.6304506456.

The spelling of 1426223209 in words is "one billion, four hundred twenty-six million, two hundred twenty-three thousand, two hundred nine".