340206405437 has 2 divisors, whose sum is σ = 340206405438. Its totient is φ = 340206405436.

The previous prime is 340206405433. The next prime is 340206405443. The reversal of 340206405437 is 734504602043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340135070521 + 71334916 = 583211^2 + 8446^2 .

It is an emirp because it is prime and its reverse (734504602043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340206405437 - 2² = 340206405433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340206405437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340206405433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170103202718 + 170103202719.

It is an arithmetic number, because the mean of its divisors is an integer number (170103202719).

Almost surely, 2^340206405437 is an apocalyptic number.

It is an amenable number.

340206405437 is a deficient number, since it is larger than the sum of its proper divisors (1).

340206405437 is an equidigital number, since it uses as much as digits as its factorization.

340206405437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 38.

The spelling of 340206405437 in words is "three hundred forty billion, two hundred six million, four hundred five thousand, four hundred thirty-seven".