6446623 has 2 divisors, whose sum is σ = 6446624. Its totient is φ = 6446622.

The previous prime is 6446611. The next prime is 6446633. The reversal of 6446623 is 3266446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6446623 - 2⁵ = 6446591 is a prime.

It is a d-powerful number, because it can be written as 6 + 4⁵ + 4¹¹ + 6⁶ + 6⁸ + 2¹⁹ + 3⁶ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6446633) 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, 3223311 + 3223312.

It is an arithmetic number, because the mean of its divisors is an integer number (3223312).

Almost surely, 2^6446623 is an apocalyptic number.

6446623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446623 is an equidigital number, since it uses as much as digits as its factorization.

6446623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 31.

The square root of 6446623 is about 2539.0200865688. The cubic root of 6446623 is about 186.1133063048.

The spelling of 6446623 in words is "six million, four hundred forty-six thousand, six hundred twenty-three".