1340011523 has 2 divisors, whose sum is σ = 1340011524. Its totient is φ = 1340011522.

The previous prime is 1340011513. The next prime is 1340011567. The reversal of 1340011523 is 3251100431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340011523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340011495 and 1340011504.

It is not a weakly prime, because it can be changed into another prime (1340011513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670005761 + 670005762.

It is an arithmetic number, because the mean of its divisors is an integer number (670005762).

Almost surely, 2^1340011523 is an apocalyptic number.

1340011523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340011523 is an equidigital number, since it uses as much as digits as its factorization.

1340011523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1340011523 is about 36606.1678272938. The cubic root of 1340011523 is about 1102.4769315912.

Adding to 1340011523 its reverse (3251100431), we get a palindrome (4591111954).

The spelling of 1340011523 in words is "one billion, three hundred forty million, eleven thousand, five hundred twenty-three".