6601213 has 2 divisors, whose sum is σ = 6601214. Its totient is φ = 6601212.

The previous prime is 6601211. The next prime is 6601223. The reversal of 6601213 is 3121066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4173849 + 2427364 = 2043^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601213 - 2¹ = 6601211 is a prime.

Together with 6601211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6601211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300606 + 3300607.

It is an arithmetic number, because the mean of its divisors is an integer number (3300607).

Almost surely, 2^6601213 is an apocalyptic number.

It is an amenable number.

6601213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601213 is an equidigital number, since it uses as much as digits as its factorization.

6601213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 6601213 is about 2569.2825846917. The cubic root of 6601213 is about 187.5892363381.

Adding to 6601213 its reverse (3121066), we get a palindrome (9722279).

The spelling of 6601213 in words is "six million, six hundred one thousand, two hundred thirteen".