2749139 has 4 divisors (see below), whose sum is σ = 2759856. Its totient is φ = 2738424.

The previous prime is 2749133. The next prime is 2749147. The reversal of 2749139 is 9319472.

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 2749139 - 2²⁰ = 1700563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2749099 and 2749108.

It is not an unprimeable number, because it can be changed into a prime (2749133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4964 + ... + 5489.

It is an arithmetic number, because the mean of its divisors is an integer number (689964).

2^2749139 is an apocalyptic number.

2749139 is a deficient number, since it is larger than the sum of its proper divisors (10717).

2749139 is a wasteful number, since it uses less digits than its factorization.

2749139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716.

The product of its digits is 13608, while the sum is 35.

The square root of 2749139 is about 1658.0527735871. The cubic root of 2749139 is about 140.0873434559.

The spelling of 2749139 in words is "two million, seven hundred forty-nine thousand, one hundred thirty-nine".