6340729859 has 2 divisors, whose sum is σ = 6340729860. Its totient is φ = 6340729858.

The previous prime is 6340729793. The next prime is 6340729867. The reversal of 6340729859 is 9589270436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6340729859 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6340729859.

It is not a weakly prime, because it can be changed into another prime (6340729159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170364929 + 3170364930.

It is an arithmetic number, because the mean of its divisors is an integer number (3170364930).

Almost surely, 2^6340729859 is an apocalyptic number.

6340729859 is a deficient number, since it is larger than the sum of its proper divisors (1).

6340729859 is an equidigital number, since it uses as much as digits as its factorization.

6340729859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 6340729859 is about 79628.6999705508. The cubic root of 6340729859 is about 1850.8863402220.

The spelling of 6340729859 in words is "six billion, three hundred forty million, seven hundred twenty-nine thousand, eight hundred fifty-nine".