1340305523 has 2 divisors, whose sum is σ = 1340305524. Its totient is φ = 1340305522.

The previous prime is 1340305493. The next prime is 1340305573. The reversal of 1340305523 is 3255030431.

It is a weak prime.

It is an emirp because it is prime and its reverse (3255030431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340305523 - 2¹⁶ = 1340239987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340305492 and 1340305501.

It is not a weakly prime, because it can be changed into another prime (1340305573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670152761 + 670152762.

It is an arithmetic number, because the mean of its divisors is an integer number (670152762).

Almost surely, 2^1340305523 is an apocalyptic number.

1340305523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340305523 is an equidigital number, since it uses as much as digits as its factorization.

1340305523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 1340305523 is about 36610.1833237694. The cubic root of 1340305523 is about 1102.5575539119.

Adding to 1340305523 its reverse (3255030431), we get a palindrome (4595335954).

The spelling of 1340305523 in words is "one billion, three hundred forty million, three hundred five thousand, five hundred twenty-three".