6631369 has 2 divisors, whose sum is σ = 6631370. Its totient is φ = 6631368.

The previous prime is 6631367. The next prime is 6631379. The reversal of 6631369 is 9631366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3655744 + 2975625 = 1912^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 6631369 - 2¹ = 6631367 is a prime.

It is a super-2 number, since 2×6631369² = 87950109628322, which contains 22 as substring.

Together with 6631367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6631367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315684 + 3315685.

It is an arithmetic number, because the mean of its divisors is an integer number (3315685).

Almost surely, 2^6631369 is an apocalyptic number.

It is an amenable number.

6631369 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631369 is an equidigital number, since it uses as much as digits as its factorization.

6631369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 6631369 is about 2575.1444619671. The cubic root of 6631369 is about 187.8744540547.

The spelling of 6631369 in words is "six million, six hundred thirty-one thousand, three hundred sixty-nine".