6729389 has 2 divisors, whose sum is σ = 6729390. Its totient is φ = 6729388.

The previous prime is 6729383. The next prime is 6729419. The reversal of 6729389 is 9839276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3736489 + 2992900 = 1933^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 6729389 - 2²⁰ = 5680813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6729383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364694 + 3364695.

It is an arithmetic number, because the mean of its divisors is an integer number (3364695).

Almost surely, 2^6729389 is an apocalyptic number.

It is an amenable number.

6729389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6729389 is an equidigital number, since it uses as much as digits as its factorization.

6729389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 6729389 is about 2594.1065899458. The cubic root of 6729389 is about 188.7956040853.

The spelling of 6729389 in words is "six million, seven hundred twenty-nine thousand, three hundred eighty-nine".