340638832693 has 2 divisors, whose sum is σ = 340638832694. Its totient is φ = 340638832692.

The previous prime is 340638832619. The next prime is 340638832697. The reversal of 340638832693 is 396238836043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304607959569 + 36030873124 = 551913^2 + 189818^2 .

It is a cyclic number.

It is not a de Polignac number, because 340638832693 - 2¹³ = 340638824501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340638832697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170319416346 + 170319416347.

It is an arithmetic number, because the mean of its divisors is an integer number (170319416347).

Almost surely, 2^340638832693 is an apocalyptic number.

It is an amenable number.

340638832693 is a deficient number, since it is larger than the sum of its proper divisors (1).

340638832693 is an equidigital number, since it uses as much as digits as its factorization.

340638832693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13436928, while the sum is 55.

The spelling of 340638832693 in words is "three hundred forty billion, six hundred thirty-eight million, eight hundred thirty-two thousand, six hundred ninety-three".