6393949 has 8 divisors (see below), whose sum is σ = 6685560. Its totient is φ = 6107136.

The previous prime is 6393943. The next prime is 6393953. The reversal of 6393949 is 9493936.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2059225 + 4334724 = 1435^2 + 2082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6393949 - 2³ = 6393941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6393941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (835695).

Almost surely, 2^6393949 is an apocalyptic number.

It is an amenable number.

6393949 is a deficient number, since it is larger than the sum of its proper divisors (291611).

6393949 is a wasteful number, since it uses less digits than its factorization.

6393949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399.

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

The square root of 6393949 is about 2528.6259114389. The cubic root of 6393949 is about 185.6050218648.

The spelling of 6393949 in words is "six million, three hundred ninety-three thousand, nine hundred forty-nine".