2049137509 has 4 divisors (see below), whose sum is σ = 2050806060. Its totient is φ = 2047468960.

The previous prime is 2049137491. The next prime is 2049137557. The reversal of 2049137509 is 9057319402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9057319402 = 2 ⋅4528659701.

It can be written as a sum of positive squares in 2 ways, for example, as 1701315009 + 347822500 = 41247^2 + 18650^2 .

It is a cyclic number.

It is not a de Polignac number, because 2049137509 - 2¹¹ = 2049135461 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049131509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832432 + ... + 834889.

It is an arithmetic number, because the mean of its divisors is an integer number (512701515).

Almost surely, 2^2049137509 is an apocalyptic number.

It is an amenable number.

2049137509 is a deficient number, since it is larger than the sum of its proper divisors (1668551).

2049137509 is a wasteful number, since it uses less digits than its factorization.

2049137509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668550.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 2049137509 is about 45267.4000689238. The cubic root of 2049137509 is about 1270.1559130302.

The spelling of 2049137509 in words is "two billion, forty-nine million, one hundred thirty-seven thousand, five hundred nine".