6478687429 has 2 divisors, whose sum is σ = 6478687430. Its totient is φ = 6478687428.

The previous prime is 6478687417. The next prime is 6478687477. The reversal of 6478687429 is 9247868746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5959531204 + 519156225 = 77198^2 + 22785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6478687429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6478657429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239343714 + 3239343715.

It is an arithmetic number, because the mean of its divisors is an integer number (3239343715).

Almost surely, 2^6478687429 is an apocalyptic number.

It is an amenable number.

6478687429 is a deficient number, since it is larger than the sum of its proper divisors (1).

6478687429 is an equidigital number, since it uses as much as digits as its factorization.

6478687429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 61.

The square root of 6478687429 is about 80490.2940049296. The cubic root of 6478687429 is about 1864.2136165759.

The spelling of 6478687429 in words is "six billion, four hundred seventy-eight million, six hundred eighty-seven thousand, four hundred twenty-nine".