6403073813 has 4 divisors (see below), whose sum is σ = 6576129900. Its totient is φ = 6230017728.

The previous prime is 6403073773. The next prime is 6403073837. The reversal of 6403073813 is 3183703046.

It is a happy number.

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 4596568804 + 1806505009 = 67798^2 + 42503^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403073813 - 2¹⁶ = 6403008277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403073863) 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 3 ways as a sum of consecutive naturals, for example, 86527988 + ... + 86528061.

It is an arithmetic number, because the mean of its divisors is an integer number (1644032475).

Almost surely, 2^6403073813 is an apocalyptic number.

It is an amenable number.

6403073813 is a deficient number, since it is larger than the sum of its proper divisors (173056087).

6403073813 is a wasteful number, since it uses less digits than its factorization.

6403073813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173056086.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 6403073813 is about 80019.2090250835. The cubic root of 6403073813 is about 1856.9327228738.

Adding to 6403073813 its reverse (3183703046), we get a palindrome (9586776859).

The spelling of 6403073813 in words is "six billion, four hundred three million, seventy-three thousand, eight hundred thirteen".