6349621 has 2 divisors, whose sum is σ = 6349622. Its totient is φ = 6349620.

The previous prime is 6349589. The next prime is 6349631. The reversal of 6349621 is 1269436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 2852721 = 1870^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 6349621 - 2⁵ = 6349589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6349631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174810 + 3174811.

It is an arithmetic number, because the mean of its divisors is an integer number (3174811).

Almost surely, 2^6349621 is an apocalyptic number.

It is an amenable number.

6349621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6349621 is an equidigital number, since it uses as much as digits as its factorization.

6349621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 6349621 is about 2519.8454317676. The cubic root of 6349621 is about 185.1751056948.

The spelling of 6349621 in words is "six million, three hundred forty-nine thousand, six hundred twenty-one".