6439493 has 2 divisors, whose sum is σ = 6439494. Its totient is φ = 6439492.

The previous prime is 6439483. The next prime is 6439507. The reversal of 6439493 is 3949346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5484964 + 954529 = 2342^2 + 977^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439493 - 2²² = 2245189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6439483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219746 + 3219747.

It is an arithmetic number, because the mean of its divisors is an integer number (3219747).

Almost surely, 2^6439493 is an apocalyptic number.

It is an amenable number.

6439493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6439493 is an equidigital number, since it uses as much as digits as its factorization.

6439493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 6439493 is about 2537.6156131298. The cubic root of 6439493 is about 186.0446668847.

The spelling of 6439493 in words is "six million, four hundred thirty-nine thousand, four hundred ninety-three".