340005434521 has 2 divisors, whose sum is σ = 340005434522. Its totient is φ = 340005434520.

The previous prime is 340005434519. The next prime is 340005434551. The reversal of 340005434521 is 125434500043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315463078921 + 24542355600 = 561661^2 + 156660^2 .

It is a cyclic number.

It is not a de Polignac number, because 340005434521 - 2¹ = 340005434519 is a prime.

Together with 340005434519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (340005434551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170002717260 + 170002717261.

It is an arithmetic number, because the mean of its divisors is an integer number (170002717261).

Almost surely, 2^340005434521 is an apocalyptic number.

It is an amenable number.

340005434521 is a deficient number, since it is larger than the sum of its proper divisors (1).

340005434521 is an equidigital number, since it uses as much as digits as its factorization.

340005434521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 340005434521 its reverse (125434500043), we get a palindrome (465439934564).

The spelling of 340005434521 in words is "three hundred forty billion, five million, four hundred thirty-four thousand, five hundred twenty-one".