1223329643 has 2 divisors, whose sum is σ = 1223329644. Its totient is φ = 1223329642.

The previous prime is 1223329637. The next prime is 1223329663. The reversal of 1223329643 is 3469233221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223329643 - 2¹² = 1223325547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223329603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611664821 + 611664822.

It is an arithmetic number, because the mean of its divisors is an integer number (611664822).

Almost surely, 2^1223329643 is an apocalyptic number.

1223329643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223329643 is an equidigital number, since it uses as much as digits as its factorization.

1223329643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 35.

The square root of 1223329643 is about 34976.1296172118. The cubic root of 1223329643 is about 1069.5009298064.

The spelling of 1223329643 in words is "one billion, two hundred twenty-three million, three hundred twenty-nine thousand, six hundred forty-three".