6446939 has 2 divisors, whose sum is σ = 6446940. Its totient is φ = 6446938.

The previous prime is 6446929. The next prime is 6446971. The reversal of 6446939 is 9396446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6446939 - 2²⁰ = 5398363 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6446896 and 6446905.

It is not a weakly prime, because it can be changed into another prime (6446929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223469 + 3223470.

It is an arithmetic number, because the mean of its divisors is an integer number (3223470).

Almost surely, 2^6446939 is an apocalyptic number.

6446939 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446939 is an equidigital number, since it uses as much as digits as its factorization.

6446939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 6446939 is about 2539.0823145381. The cubic root of 6446939 is about 186.1163472170.

The spelling of 6446939 in words is "six million, four hundred forty-six thousand, nine hundred thirty-nine".