1340268361 has 2 divisors, whose sum is σ = 1340268362. Its totient is φ = 1340268360.

The previous prime is 1340268359. The next prime is 1340268373. The reversal of 1340268361 is 1638620431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 949810761 + 390457600 = 30819^2 + 19760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340268361 - 2¹ = 1340268359 is a prime.

Together with 1340268359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1340268301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670134180 + 670134181.

It is an arithmetic number, because the mean of its divisors is an integer number (670134181).

Almost surely, 2^1340268361 is an apocalyptic number.

It is an amenable number.

1340268361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340268361 is an equidigital number, since it uses as much as digits as its factorization.

1340268361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1340268361 is about 36609.6757838689. The cubic root of 1340268361 is about 1102.5473637919.

Adding to 1340268361 its reverse (1638620431), we get a palindrome (2978888792).

The spelling of 1340268361 in words is "one billion, three hundred forty million, two hundred sixty-eight thousand, three hundred sixty-one".