6404339 has 4 divisors (see below), whose sum is σ = 6451224. Its totient is φ = 6357456.

The previous prime is 6404317. The next prime is 6404341. The reversal of 6404339 is 9334046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9334046 = 2 ⋅4667023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404339 is a prime.

It is a d-powerful number, because it can be written as 6 + 4⁶ + 0 + 4⁷ + 3¹³ + 3¹⁴ + 9⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6404369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23237 + ... + 23510.

It is an arithmetic number, because the mean of its divisors is an integer number (1612806).

Almost surely, 2^6404339 is an apocalyptic number.

6404339 is a deficient number, since it is larger than the sum of its proper divisors (46885).

6404339 is a wasteful number, since it uses less digits than its factorization.

6404339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46884.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 6404339 is about 2530.6795530055. The cubic root of 6404339 is about 185.7055018951.

The spelling of 6404339 in words is "six million, four hundred four thousand, three hundred thirty-nine".