1223799539 has 2 divisors, whose sum is σ = 1223799540. Its totient is φ = 1223799538.

The previous prime is 1223799497. The next prime is 1223799541. The reversal of 1223799539 is 9359973221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223799539 is a prime.

It is a super-2 number, since 2×1223799539² = 2995370623313225042, which contains 22 as substring.

Together with 1223799541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1223799569) 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, 611899769 + 611899770.

It is an arithmetic number, because the mean of its divisors is an integer number (611899770).

Almost surely, 2^1223799539 is an apocalyptic number.

1223799539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223799539 is an equidigital number, since it uses as much as digits as its factorization.

1223799539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 1223799539 is about 34982.8463536059. The cubic root of 1223799539 is about 1069.6378484421.

The spelling of 1223799539 in words is "one billion, two hundred twenty-three million, seven hundred ninety-nine thousand, five hundred thirty-nine".