340341878642917 has 2 divisors, whose sum is σ = 340341878642918. Its totient is φ = 340341878642916.

The previous prime is 340341878642903. The next prime is 340341878642921. The reversal of 340341878642917 is 719246878143043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340209503463361 + 132375179556 = 18444769^2 + 363834^2 .

It is a cyclic number.

It is not a de Polignac number, because 340341878642917 - 2⁷ = 340341878642789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340341878642957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170170939321458 + 170170939321459.

It is an arithmetic number, because the mean of its divisors is an integer number (170170939321459).

Almost surely, 2^{340341878642917} is an apocalyptic number.

It is an amenable number.

340341878642917 is a deficient number, since it is larger than the sum of its proper divisors (1).

340341878642917 is an equidigital number, since it uses as much as digits as its factorization.

340341878642917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 195084288, while the sum is 67.

The spelling of 340341878642917 in words is "three hundred forty trillion, three hundred forty-one billion, eight hundred seventy-eight million, six hundred forty-two thousand, nine hundred seventeen".