2749091139 has 12 divisors (see below), whose sum is σ = 3974744800. Its totient is φ = 1830957264.

The previous prime is 2749091119. The next prime is 2749091141. The reversal of 2749091139 is 9311909472.

2749091139 is a `hidden beast` number, since 27 + 490 + 9 + 1 + 139 = 666.

It is not a de Polignac number, because 2749091139 - 2⁹ = 2749090627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2749091094 and 2749091103.

It is not an unprimeable number, because it can be changed into a prime (2749091119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137644 + ... + 156345.

Almost surely, 2^2749091139 is an apocalyptic number.

2749091139 is a deficient number, since it is larger than the sum of its proper divisors (1225653661).

2749091139 is a wasteful number, since it uses less digits than its factorization.

2749091139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295034 (or 295031 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 2749091139 is about 52431.7760427777. The cubic root of 2749091139 is about 1400.8653050324.

The spelling of 2749091139 in words is "two billion, seven hundred forty-nine million, ninety-one thousand, one hundred thirty-nine".