340504523 has 2 divisors, whose sum is σ = 340504524. Its totient is φ = 340504522.

The previous prime is 340504513. The next prime is 340504559. The reversal of 340504523 is 325405043.

It is a weak prime.

It is an emirp because it is prime and its reverse (325405043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340504523 - 2²⁶ = 273395659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340504492 and 340504501.

It is not a weakly prime, because it can be changed into another prime (340504513) 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, 170252261 + 170252262.

It is an arithmetic number, because the mean of its divisors is an integer number (170252262).

Almost surely, 2^340504523 is an apocalyptic number.

340504523 is a deficient number, since it is larger than the sum of its proper divisors (1).

340504523 is an equidigital number, since it uses as much as digits as its factorization.

340504523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 340504523 is about 18452.7646438142. The cubic root of 340504523 is about 698.2982629382.

Adding to 340504523 its reverse (325405043), we get a palindrome (665909566).

The spelling of 340504523 in words is "three hundred forty million, five hundred four thousand, five hundred twenty-three".