1320013309949 has 2 divisors, whose sum is σ = 1320013309950. Its totient is φ = 1320013309948.

The previous prime is 1320013309933. The next prime is 1320013310009. The reversal of 1320013309949 is 9499033100231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290455104324 + 29558205625 = 1135982^2 + 171925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320013309949 - 2⁴ = 1320013309933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320013309049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660006654974 + 660006654975.

It is an arithmetic number, because the mean of its divisors is an integer number (660006654975).

Almost surely, 2^{1320013309949} is an apocalyptic number.

It is an amenable number.

1320013309949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320013309949 is an equidigital number, since it uses as much as digits as its factorization.

1320013309949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 1320013309949 in words is "one trillion, three hundred twenty billion, thirteen million, three hundred nine thousand, nine hundred forty-nine".