340306306523 has 2 divisors, whose sum is σ = 340306306524. Its totient is φ = 340306306522.

The previous prime is 340306306519. The next prime is 340306306597. The reversal of 340306306523 is 325603603043.

It is a weak prime.

It is an emirp because it is prime and its reverse (325603603043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340306306523 - 2² = 340306306519 is a prime.

It is not a weakly prime, because it can be changed into another prime (340306306513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170153153261 + 170153153262.

It is an arithmetic number, because the mean of its divisors is an integer number (170153153262).

Almost surely, 2^340306306523 is an apocalyptic number.

340306306523 is a deficient number, since it is larger than the sum of its proper divisors (1).

340306306523 is an equidigital number, since it uses as much as digits as its factorization.

340306306523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 35.

Adding to 340306306523 its reverse (325603603043), we get a palindrome (665909909566).

The spelling of 340306306523 in words is "three hundred forty billion, three hundred six million, three hundred six thousand, five hundred twenty-three".