6429139 has 2 divisors, whose sum is σ = 6429140. Its totient is φ = 6429138.

The previous prime is 6429109. The next prime is 6429149. The reversal of 6429139 is 9319246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6429139 - 2⁵ = 6429107 is a prime.

It is not a weakly prime, because it can be changed into another prime (6429109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214569 + 3214570.

It is an arithmetic number, because the mean of its divisors is an integer number (3214570).

Almost surely, 2^6429139 is an apocalyptic number.

6429139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6429139 is an equidigital number, since it uses as much as digits as its factorization.

6429139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 6429139 is about 2535.5746883103. The cubic root of 6429139 is about 185.9449002398.

The spelling of 6429139 in words is "six million, four hundred twenty-nine thousand, one hundred thirty-nine".