6642319 has 2 divisors, whose sum is σ = 6642320. Its totient is φ = 6642318.

The previous prime is 6642301. The next prime is 6642329. The reversal of 6642319 is 9132466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6642319 - 2¹⁷ = 6511247 is a prime.

It is a super-2 number, since 2×6642319² = 88240803395522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6642329) 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, 3321159 + 3321160.

It is an arithmetic number, because the mean of its divisors is an integer number (3321160).

Almost surely, 2^6642319 is an apocalyptic number.

6642319 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642319 is an equidigital number, since it uses as much as digits as its factorization.

6642319 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 6642319 is about 2577.2696793312. The cubic root of 6642319 is about 187.9778059661.

The spelling of 6642319 in words is "six million, six hundred forty-two thousand, three hundred nineteen".