1223503979 has 2 divisors, whose sum is σ = 1223503980. Its totient is φ = 1223503978.

The previous prime is 1223503961. The next prime is 1223504011. The reversal of 1223503979 is 9793053221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223503979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223503279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611751989 + 611751990.

It is an arithmetic number, because the mean of its divisors is an integer number (611751990).

Almost surely, 2^1223503979 is an apocalyptic number.

1223503979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223503979 is an equidigital number, since it uses as much as digits as its factorization.

1223503979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 1223503979 is about 34978.6217424300. The cubic root of 1223503979 is about 1069.5517320463.

The spelling of 1223503979 in words is "one billion, two hundred twenty-three million, five hundred three thousand, nine hundred seventy-nine".