1340305573 has 2 divisors, whose sum is σ = 1340305574. Its totient is φ = 1340305572.

The previous prime is 1340305523. The next prime is 1340305579. The reversal of 1340305573 is 3755030431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1280351524 + 59954049 = 35782^2 + 7743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340305573 - 2¹³ = 1340297381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340305579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670152786 + 670152787.

It is an arithmetic number, because the mean of its divisors is an integer number (670152787).

Almost surely, 2^1340305573 is an apocalyptic number.

It is an amenable number.

1340305573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340305573 is an equidigital number, since it uses as much as digits as its factorization.

1340305573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 1340305573 is about 36610.1840066395. The cubic root of 1340305573 is about 1102.5575676222.

The spelling of 1340305573 in words is "one billion, three hundred forty million, three hundred five thousand, five hundred seventy-three".