6439123 has 2 divisors, whose sum is σ = 6439124. Its totient is φ = 6439122.

The previous prime is 6439067. The next prime is 6439127. The reversal of 6439123 is 3219346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6439123 - 2²¹ = 4341971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6439091 and 6439100.

It is not a weakly prime, because it can be changed into another prime (6439127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219561 + 3219562.

It is an arithmetic number, because the mean of its divisors is an integer number (3219562).

Almost surely, 2^6439123 is an apocalyptic number.

6439123 is a deficient number, since it is larger than the sum of its proper divisors (1).

6439123 is an equidigital number, since it uses as much as digits as its factorization.

6439123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 6439123 is about 2537.5427090002. The cubic root of 6439123 is about 186.0411035687.

The spelling of 6439123 in words is "six million, four hundred thirty-nine thousand, one hundred twenty-three".