1223203139 has 2 divisors, whose sum is σ = 1223203140. Its totient is φ = 1223203138.

The previous prime is 1223203103. The next prime is 1223203213. The reversal of 1223203139 is 9313023221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223203139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223203439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611601569 + 611601570.

It is an arithmetic number, because the mean of its divisors is an integer number (611601570).

Almost surely, 2^1223203139 is an apocalyptic number.

1223203139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223203139 is an equidigital number, since it uses as much as digits as its factorization.

1223203139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1223203139 is about 34974.3211370857. The cubic root of 1223203139 is about 1069.4640629896.

The spelling of 1223203139 in words is "one billion, two hundred twenty-three million, two hundred three thousand, one hundred thirty-nine".