2731139 has 4 divisors (see below), whose sum is σ = 2742024. Its totient is φ = 2720256.

The previous prime is 2731129. The next prime is 2731147. The reversal of 2731139 is 9311372.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2731139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2731129) 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, 5057 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (685506).

2^2731139 is an apocalyptic number.

2731139 is a deficient number, since it is larger than the sum of its proper divisors (10885).

2731139 is a wasteful number, since it uses less digits than its factorization.

2731139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10884.

The product of its digits is 1134, while the sum is 26.

The square root of 2731139 is about 1652.6158053220. The cubic root of 2731139 is about 139.7809329005.

The spelling of 2731139 in words is "two million, seven hundred thirty-one thousand, one hundred thirty-nine".