6493939 has 4 divisors (see below), whose sum is σ = 6504624. Its totient is φ = 6483256.

The previous prime is 6493933. The next prime is 6493957. The reversal of 6493939 is 9393946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9393946 = 2 ⋅4696973.

It is a cyclic number.

It is not a de Polignac number, because 6493939 - 2¹⁹ = 5969651 is a prime.

It is a Duffinian number.

6493939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6493895 and 6493904.

It is not an unprimeable number, because it can be changed into a prime (6493933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4372 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (1626156).

Almost surely, 2^6493939 is an apocalyptic number.

6493939 is a deficient number, since it is larger than the sum of its proper divisors (10685).

6493939 is a wasteful number, since it uses less digits than its factorization.

6493939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684.

The product of its digits is 157464, while the sum is 43.

The square root of 6493939 is about 2548.3208196771. The cubic root of 6493939 is about 186.5675327501.

The spelling of 6493939 in words is "six million, four hundred ninety-three thousand, nine hundred thirty-nine".