1326997123 has 2 divisors, whose sum is σ = 1326997124. Its totient is φ = 1326997122.

The previous prime is 1326997099. The next prime is 1326997223. The reversal of 1326997123 is 3217996231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326997123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326997123.

It is not a weakly prime, because it can be changed into another prime (1326997223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663498561 + 663498562.

It is an arithmetic number, because the mean of its divisors is an integer number (663498562).

Almost surely, 2^1326997123 is an apocalyptic number.

1326997123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326997123 is an equidigital number, since it uses as much as digits as its factorization.

1326997123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 1326997123 is about 36427.9717113100. The cubic root of 1326997123 is about 1098.8961717641.

The spelling of 1326997123 in words is "one billion, three hundred twenty-six million, nine hundred ninety-seven thousand, one hundred twenty-three".