6591139 has 4 divisors (see below), whose sum is σ = 6731424. Its totient is φ = 6450856.

The previous prime is 6591089. The next prime is 6591163. The reversal of 6591139 is 9311956.

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 6591139 - 2¹¹ = 6589091 is a prime.

It is a super-2 number, since 2×6591139² = 86886226634642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6594139) 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, 70072 + ... + 70165.

It is an arithmetic number, because the mean of its divisors is an integer number (1682856).

Almost surely, 2^6591139 is an apocalyptic number.

6591139 is a deficient number, since it is larger than the sum of its proper divisors (140285).

6591139 is a wasteful number, since it uses less digits than its factorization.

6591139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140284.

The product of its digits is 7290, while the sum is 34.

The square root of 6591139 is about 2567.3213667167. The cubic root of 6591139 is about 187.4937621628.

It can be divided in two parts, 65 and 91139, that added together give a square (91204 = 302²).

The spelling of 6591139 in words is "six million, five hundred ninety-one thousand, one hundred thirty-nine".