6720629 has 2 divisors, whose sum is σ = 6720630. Its totient is φ = 6720628.

The previous prime is 6720619. The next prime is 6720667. The reversal of 6720629 is 9260276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5750404 + 970225 = 2398^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 6720629 - 2¹² = 6716533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6720595 and 6720604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6720619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360314 + 3360315.

It is an arithmetic number, because the mean of its divisors is an integer number (3360315).

Almost surely, 2^6720629 is an apocalyptic number.

It is an amenable number.

6720629 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720629 is an equidigital number, since it uses as much as digits as its factorization.

6720629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6720629 is about 2592.4175975332. The cubic root of 6720629 is about 188.7136467859.

The spelling of 6720629 in words is "six million, seven hundred twenty thousand, six hundred twenty-nine".