6439147 has 16 divisors (see below), whose sum is σ = 7775712. Its totient is φ = 5253120.

The previous prime is 6439133. The next prime is 6439159. The reversal of 6439147 is 7419346.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6439147 - 2¹¹ = 6437099 is a prime.

It is a super-2 number, since 2×6439147² = 82925228175218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4683 + ... + 5899.

It is an arithmetic number, because the mean of its divisors is an integer number (485982).

Almost surely, 2^6439147 is an apocalyptic number.

6439147 is a deficient number, since it is larger than the sum of its proper divisors (1336565).

6439147 is a wasteful number, since it uses less digits than its factorization.

6439147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its digits is 18144, while the sum is 34.

The square root of 6439147 is about 2537.5474379802. The cubic root of 6439147 is about 186.0413347068.

The spelling of 6439147 in words is "six million, four hundred thirty-nine thousand, one hundred forty-seven".