6340409129 has 2 divisors, whose sum is σ = 6340409130. Its totient is φ = 6340409128.

The previous prime is 6340409123. The next prime is 6340409177. The reversal of 6340409129 is 9219040436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5978382400 + 362026729 = 77320^2 + 19027^2 .

It is a cyclic number.

It is not a de Polignac number, because 6340409129 - 2¹² = 6340405033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6340409092 and 6340409101.

It is not a weakly prime, because it can be changed into another prime (6340409123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170204564 + 3170204565.

It is an arithmetic number, because the mean of its divisors is an integer number (3170204565).

Almost surely, 2^6340409129 is an apocalyptic number.

It is an amenable number.

6340409129 is a deficient number, since it is larger than the sum of its proper divisors (1).

6340409129 is an equidigital number, since it uses as much as digits as its factorization.

6340409129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6340409129 is about 79626.6860355245. The cubic root of 6340409129 is about 1850.8551322066.

The spelling of 6340409129 in words is "six billion, three hundred forty million, four hundred nine thousand, one hundred twenty-nine".