4129629809 has 4 divisors (see below), whose sum is σ = 4129942260. Its totient is φ = 4129317360.

The previous prime is 4129629799. The next prime is 4129629853. The reversal of 4129629809 is 9089269214.

It is a happy number.

4129629809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2206368784 + 1923261025 = 46972^2 + 43855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4129629809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4129625809) 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, 135482 + ... + 163139.

It is an arithmetic number, because the mean of its divisors is an integer number (1032485565).

Almost surely, 2^4129629809 is an apocalyptic number.

It is an amenable number.

4129629809 is a deficient number, since it is larger than the sum of its proper divisors (312451).

4129629809 is a wasteful number, since it uses less digits than its factorization.

4129629809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312450.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 4129629809 is about 64262.1957997079. The cubic root of 4129629809 is about 1604.3669516201.

The spelling of 4129629809 in words is "four billion, one hundred twenty-nine million, six hundred twenty-nine thousand, eight hundred nine".