6404911 has 4 divisors (see below), whose sum is σ = 6625800. Its totient is φ = 6184024.

The previous prime is 6404873. The next prime is 6404917. The reversal of 6404911 is 1194046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404911 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 (6404917) 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, 110401 + ... + 110458.

It is an arithmetic number, because the mean of its divisors is an integer number (1656450).

Almost surely, 2^6404911 is an apocalyptic number.

6404911 is a deficient number, since it is larger than the sum of its proper divisors (220889).

6404911 is a wasteful number, since it uses less digits than its factorization.

6404911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220888.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 6404911 is about 2530.7925636053. The cubic root of 6404911 is about 185.7110304586.

Adding to 6404911 its reverse (1194046), we get a palindrome (7598957).

The spelling of 6404911 in words is "six million, four hundred four thousand, nine hundred eleven".