6438973 has 2 divisors, whose sum is σ = 6438974. Its totient is φ = 6438972.

The previous prime is 6438961. The next prime is 6438983. The reversal of 6438973 is 3798346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6335289 + 103684 = 2517^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6438973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6438923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219486 + 3219487.

It is an arithmetic number, because the mean of its divisors is an integer number (3219487).

Almost surely, 2^6438973 is an apocalyptic number.

It is an amenable number.

6438973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438973 is an equidigital number, since it uses as much as digits as its factorization.

6438973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 6438973 is about 2537.5131526753. The cubic root of 6438973 is about 186.0396589422.

The spelling of 6438973 in words is "six million, four hundred thirty-eight thousand, nine hundred seventy-three".