6739643 has 2 divisors, whose sum is σ = 6739644. Its totient is φ = 6739642.

The previous prime is 6739627. The next prime is 6739709. The reversal of 6739643 is 3469376.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6739643 - 2⁴ = 6739627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6739597 and 6739606.

It is not a weakly prime, because it can be changed into another prime (6739043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3369821 + 3369822.

It is an arithmetic number, because the mean of its divisors is an integer number (3369822).

Almost surely, 2^6739643 is an apocalyptic number.

6739643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6739643 is an equidigital number, since it uses as much as digits as its factorization.

6739643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 38.

The square root of 6739643 is about 2596.0822406080. The cubic root of 6739643 is about 188.8914487286.

It can be divided in two parts, 67396 and 43, that multiplied together give a triangular number (2898028 = T₂₄₀₇).

The spelling of 6739643 in words is "six million, seven hundred thirty-nine thousand, six hundred forty-three".