6403430709 has 24 divisors (see below), whose sum is σ = 9971783640. Its totient is φ = 3936264192.

The previous prime is 6403430707. The next prime is 6403430723. The reversal of 6403430709 is 9070343046.

6403430709 is a `hidden beast` number, since 640 + 3 + 4 + 3 + 0 + 7 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1830609 + 6401600100 = 1353^2 + 80010^2 .

It is not a de Polignac number, because 6403430709 - 2¹ = 6403430707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403430701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79237 + ... + 138149.

It is an arithmetic number, because the mean of its divisors is an integer number (415490985).

Almost surely, 2^6403430709 is an apocalyptic number.

It is an amenable number.

6403430709 is a deficient number, since it is larger than the sum of its proper divisors (3568352931).

6403430709 is a wasteful number, since it uses less digits than its factorization.

6403430709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59861 (or 59858 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 6403430709 is about 80021.4390585423. The cubic root of 6403430709 is about 1856.9672229472.

The spelling of 6403430709 in words is "six billion, four hundred three million, four hundred thirty thousand, seven hundred nine".