6550139 has 4 divisors (see below), whose sum is σ = 6577560. Its totient is φ = 6522720.

The previous prime is 6550129. The next prime is 6550157. The reversal of 6550139 is 9310556.

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 6550139 - 2⁴ = 6550123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6550109) 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, 13349 + ... + 13830.

It is an arithmetic number, because the mean of its divisors is an integer number (1644390).

Almost surely, 2^6550139 is an apocalyptic number.

6550139 is a deficient number, since it is larger than the sum of its proper divisors (27421).

6550139 is a wasteful number, since it uses less digits than its factorization.

6550139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27420.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 6550139 is about 2559.3239341670. The cubic root of 6550139 is about 187.1041866538.

The spelling of 6550139 in words is "six million, five hundred fifty thousand, one hundred thirty-nine".