1223491439 has 2 divisors, whose sum is σ = 1223491440. Its totient is φ = 1223491438.

The previous prime is 1223491421. The next prime is 1223491441. The reversal of 1223491439 is 9341943221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223491439 - 2²⁰ = 1222442863 is a prime.

Together with 1223491441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223491499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611745719 + 611745720.

It is an arithmetic number, because the mean of its divisors is an integer number (611745720).

Almost surely, 2^1223491439 is an apocalyptic number.

1223491439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223491439 is an equidigital number, since it uses as much as digits as its factorization.

1223491439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 1223491439 is about 34978.4424896249. The cubic root of 1223491439 is about 1069.5480779989.

The spelling of 1223491439 in words is "one billion, two hundred twenty-three million, four hundred ninety-one thousand, four hundred thirty-nine".