6349921 has 2 divisors, whose sum is σ = 6349922. Its totient is φ = 6349920.

The previous prime is 6349919. The next prime is 6349951. The reversal of 6349921 is 1299436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5456896 + 893025 = 2336^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 6349921 - 2¹ = 6349919 is a prime.

Together with 6349919, it forms a pair of twin primes.

6349921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6349951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174960 + 3174961.

It is an arithmetic number, because the mean of its divisors is an integer number (3174961).

Almost surely, 2^6349921 is an apocalyptic number.

It is an amenable number.

6349921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6349921 is an equidigital number, since it uses as much as digits as its factorization.

6349921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 6349921 is about 2519.9049585252. The cubic root of 6349921 is about 185.1780219664.

The spelling of 6349921 in words is "six million, three hundred forty-nine thousand, nine hundred twenty-one".