1200773792909 has 2 divisors, whose sum is σ = 1200773792910. Its totient is φ = 1200773792908.

The previous prime is 1200773792819. The next prime is 1200773792917. The reversal of 1200773792909 is 9092973770021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951395406025 + 249378386884 = 975395^2 + 499378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200773792909 - 2²⁰ = 1200772744333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200773792929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600386896454 + 600386896455.

It is an arithmetic number, because the mean of its divisors is an integer number (600386896455).

Almost surely, 2^{1200773792909} is an apocalyptic number.

It is an amenable number.

1200773792909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200773792909 is an equidigital number, since it uses as much as digits as its factorization.

1200773792909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The spelling of 1200773792909 in words is "one trillion, two hundred billion, seven hundred seventy-three million, seven hundred ninety-two thousand, nine hundred nine".