6398723 has 2 divisors, whose sum is σ = 6398724. Its totient is φ = 6398722.

The previous prime is 6398671. The next prime is 6398729. The reversal of 6398723 is 3278936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6398723 - 2⁸ = 6398467 is a prime.

It is not a weakly prime, because it can be changed into another prime (6398729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199361 + 3199362.

It is an arithmetic number, because the mean of its divisors is an integer number (3199362).

Almost surely, 2^6398723 is an apocalyptic number.

6398723 is a deficient number, since it is larger than the sum of its proper divisors (1).

6398723 is an equidigital number, since it uses as much as digits as its factorization.

6398723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 6398723 is about 2529.5697262578. The cubic root of 6398723 is about 185.6512039628.

The spelling of 6398723 in words is "six million, three hundred ninety-eight thousand, seven hundred twenty-three".