6619849 has 2 divisors, whose sum is σ = 6619850. Its totient is φ = 6619848.

The previous prime is 6619829. The next prime is 6619861. The reversal of 6619849 is 9489166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 2699449 = 1980^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 6619849 - 2¹⁷ = 6488777 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6619829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309924 + 3309925.

It is an arithmetic number, because the mean of its divisors is an integer number (3309925).

Almost surely, 2^6619849 is an apocalyptic number.

It is an amenable number.

6619849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6619849 is an equidigital number, since it uses as much as digits as its factorization.

6619849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 6619849 is about 2572.9067219781. The cubic root of 6619849 is about 187.7655992968.

The spelling of 6619849 in words is "six million, six hundred nineteen thousand, eight hundred forty-nine".