6404123713 has 4 divisors (see below), whose sum is σ = 6896748628. Its totient is φ = 5911498800.

The previous prime is 6404123707. The next prime is 6404123741. The reversal of 6404123713 is 3173214046.

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 3673329664 + 2730794049 = 60608^2 + 52257^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404123713 - 2⁵ = 6404123681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6404123753) 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, 246312438 + ... + 246312463.

It is an arithmetic number, because the mean of its divisors is an integer number (1724187157).

Almost surely, 2^6404123713 is an apocalyptic number.

It is an amenable number.

6404123713 is a deficient number, since it is larger than the sum of its proper divisors (492624915).

6404123713 is a wasteful number, since it uses less digits than its factorization.

6404123713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492624914.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 6404123713 is about 80025.7690559735. The cubic root of 6404123713 is about 1857.0342099187.

Adding to 6404123713 its reverse (3173214046), we get a palindrome (9577337759).

The spelling of 6404123713 in words is "six billion, four hundred four million, one hundred twenty-three thousand, seven hundred thirteen".