6400053 has 30 divisors (see below), whose sum is σ = 10524822. Its totient is φ = 3872880.

The previous prime is 6400033. The next prime is 6400091. The reversal of 6400053 is 3500046.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4743684 + 1656369 = 2178^2 + 1287^2 .

It is not a de Polignac number, because 6400053 - 2⁸ = 6399797 is a prime.

It is an Ulam number.

6400053 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6399999 and 6400035.

It is a congruent number.

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

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 9475 + ... + 10127.

Almost surely, 2^6400053 is an apocalyptic number.

It is an amenable number.

6400053 is a deficient number, since it is larger than the sum of its proper divisors (4124769).

6400053 is a wasteful number, since it uses less digits than its factorization.

6400053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 6400053 is about 2529.8326031578. The cubic root of 6400053 is about 185.6640658519.

Adding to 6400053 its reverse (3500046), we get a palindrome (9900099).

The spelling of 6400053 in words is "six million, four hundred thousand, fifty-three".