1200645317 has 2 divisors, whose sum is σ = 1200645318. Its totient is φ = 1200645316.

The previous prime is 1200645311. The next prime is 1200645319. The reversal of 1200645317 is 7135460021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199860321 + 784996 = 34639^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200645317 - 2¹⁶ = 1200579781 is a prime.

Together with 1200645319, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200645317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200645311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600322658 + 600322659.

It is an arithmetic number, because the mean of its divisors is an integer number (600322659).

Almost surely, 2^1200645317 is an apocalyptic number.

It is an amenable number.

1200645317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200645317 is an equidigital number, since it uses as much as digits as its factorization.

1200645317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1200645317 is about 34650.3292480750. The cubic root of 1200645317 is about 1062.8490216138.

The spelling of 1200645317 in words is "one billion, two hundred million, six hundred forty-five thousand, three hundred seventeen".