6429381999 has 4 divisors (see below), whose sum is σ = 8572509336. Its totient is φ = 4286254664.

The previous prime is 6429381991. The next prime is 6429382019. The reversal of 6429381999 is 9991839246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6429381999 - 2³ = 6429381991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429381991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071563664 + ... + 1071563669.

It is an arithmetic number, because the mean of its divisors is an integer number (2143127334).

Almost surely, 2^6429381999 is an apocalyptic number.

6429381999 is a deficient number, since it is larger than the sum of its proper divisors (2143127337).

6429381999 is a wasteful number, since it uses less digits than its factorization.

6429381999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143127336.

The product of its digits is 7558272, while the sum is 60.

The square root of 6429381999 is about 80183.4272091185. The cubic root of 6429381999 is about 1859.4724289955.

The spelling of 6429381999 in words is "six billion, four hundred twenty-nine million, three hundred eighty-one thousand, nine hundred ninety-nine".