6423939 has 6 divisors (see below), whose sum is σ = 9279036. Its totient is φ = 4282620.

The previous prime is 6423929. The next prime is 6423947. The reversal of 6423939 is 9393246.

It is a happy number.

6423939 is a `hidden beast` number, since 642 + 3 + 9 + 3 + 9 = 666.

It is not a de Polignac number, because 6423939 - 2⁷ = 6423811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6423929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356877 + ... + 356894.

It is an arithmetic number, because the mean of its divisors is an integer number (1546506).

Almost surely, 2^6423939 is an apocalyptic number.

6423939 is a deficient number, since it is larger than the sum of its proper divisors (2855097).

6423939 is a wasteful number, since it uses less digits than its factorization.

6423939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713777 (or 713774 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 6423939 is about 2534.5490723204. The cubic root of 6423939 is about 185.8947548894.

The spelling of 6423939 in words is "six million, four hundred twenty-three thousand, nine hundred thirty-nine".