6456623 has 2 divisors, whose sum is σ = 6456624. Its totient is φ = 6456622.

The previous prime is 6456613. The next prime is 6456641. The reversal of 6456623 is 3266546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6456623 - 2⁴ = 6456607 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6456623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6456613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228311 + 3228312.

It is an arithmetic number, because the mean of its divisors is an integer number (3228312).

Almost surely, 2^6456623 is an apocalyptic number.

6456623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456623 is an equidigital number, since it uses as much as digits as its factorization.

6456623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 32.

The square root of 6456623 is about 2540.9885871448. The cubic root of 6456623 is about 186.2094895603.

The spelling of 6456623 in words is "six million, four hundred fifty-six thousand, six hundred twenty-three".