6439743 has 12 divisors (see below), whose sum is σ = 9646728. Its totient is φ = 4293000.

The previous prime is 6439729. The next prime is 6439751. The reversal of 6439743 is 3479346.

6439743 is a `hidden beast` number, since 643 + 9 + 7 + 4 + 3 = 666.

It is not a de Polignac number, because 6439743 - 2⁶ = 6439679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6439698 and 6439707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13008 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (803894).

Almost surely, 2^6439743 is an apocalyptic number.

6439743 is a deficient number, since it is larger than the sum of its proper divisors (3206985).

6439743 is an equidigital number, since it uses as much as digits as its factorization.

6439743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26516 (or 26504 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 6439743 is about 2537.6648714911. The cubic root of 6439743 is about 186.0470744534.

The spelling of 6439743 in words is "six million, four hundred thirty-nine thousand, seven hundred forty-three".