49108909 has 4 divisors (see below), whose sum is σ = 49291740. Its totient is φ = 48926080.

The previous prime is 49108907. The next prime is 49108921. The reversal of 49108909 is 90980194.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25857225 + 23251684 = 5085^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 49108909 - 2¹ = 49108907 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 (49108907) 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, 91012 + ... + 91549.

It is an arithmetic number, because the mean of its divisors is an integer number (12322935).

Almost surely, 2^49108909 is an apocalyptic number.

It is an amenable number.

49108909 is a deficient number, since it is larger than the sum of its proper divisors (182831).

49108909 is a wasteful number, since it uses less digits than its factorization.

49108909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182830.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 49108909 is about 7007.7748964989. The cubic root of 49108909 is about 366.2014801361.

The spelling of 49108909 in words is "forty-nine million, one hundred eight thousand, nine hundred nine".