49509109 has 8 divisors (see below), whose sum is σ = 53511192. Its totient is φ = 45534720.

The previous prime is 49509107. The next prime is 49509121. The reversal of 49509109 is 90190594.

It can be written as a sum of positive squares in 4 ways, for example, as 8868484 + 40640625 = 2978^2 + 6375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49509109 - 2¹ = 49509107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49509107) 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 7 ways as a sum of consecutive naturals, for example, 3124 + ... + 10429.

It is an arithmetic number, because the mean of its divisors is an integer number (6688899).

Almost surely, 2^49509109 is an apocalyptic number.

It is an amenable number.

49509109 is a deficient number, since it is larger than the sum of its proper divisors (4002083).

49509109 is a wasteful number, since it uses less digits than its factorization.

49509109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13847.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 49509109 is about 7036.2709583983. The cubic root of 49509109 is about 367.1935440164.

The spelling of 49509109 in words is "forty-nine million, five hundred nine thousand, one hundred nine".