6400913 has 4 divisors (see below), whose sum is σ = 6505908. Its totient is φ = 6295920.

The previous prime is 6400873. The next prime is 6400921. The reversal of 6400913 is 3190046.

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 1329409 + 5071504 = 1153^2 + 2252^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400913 - 2⁸ = 6400657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52406 + ... + 52527.

It is an arithmetic number, because the mean of its divisors is an integer number (1626477).

Almost surely, 2^6400913 is an apocalyptic number.

It is an amenable number.

6400913 is a deficient number, since it is larger than the sum of its proper divisors (104995).

6400913 is a wasteful number, since it uses less digits than its factorization.

6400913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104994.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 6400913 is about 2530.0025691687. The cubic root of 6400913 is about 185.6723816135.

Adding to 6400913 its reverse (3190046), we get a palindrome (9590959).

The spelling of 6400913 in words is "six million, four hundred thousand, nine hundred thirteen".