6654139 has 4 divisors (see below), whose sum is σ = 6670440. Its totient is φ = 6637840.

The previous prime is 6654127. The next prime is 6654143. The reversal of 6654139 is 9314566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6654139 - 2⁹ = 6653627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6654539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7522 + ... + 8359.

It is an arithmetic number, because the mean of its divisors is an integer number (1667610).

Almost surely, 2^6654139 is an apocalyptic number.

6654139 is a deficient number, since it is larger than the sum of its proper divisors (16301).

6654139 is a wasteful number, since it uses less digits than its factorization.

6654139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16300.

The product of its digits is 19440, while the sum is 34.

The square root of 6654139 is about 2579.5617844898. The cubic root of 6654139 is about 188.0892419979.

The spelling of 6654139 in words is "six million, six hundred fifty-four thousand, one hundred thirty-nine".