49643109 has 12 divisors (see below), whose sum is σ = 71969196. Its totient is φ = 32974272.

The previous prime is 49643107. The next prime is 49643147. The reversal of 49643109 is 90134694.

49643109 is a `hidden beast` number, since 4 + 9 + 643 + 1 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4040100 + 45603009 = 2010^2 + 6753^2 .

It is not a de Polignac number, because 49643109 - 2¹ = 49643107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49643101) 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 11 ways as a sum of consecutive naturals, for example, 7464 + ... + 12449.

It is an arithmetic number, because the mean of its divisors is an integer number (5997433).

Almost surely, 2^49643109 is an apocalyptic number.

It is an amenable number.

49643109 is a deficient number, since it is larger than the sum of its proper divisors (22326087).

49643109 is a wasteful number, since it uses less digits than its factorization.

49643109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196 (or 20193 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 49643109 is about 7045.7866132888. The cubic root of 49643109 is about 367.5245242554.

The spelling of 49643109 in words is "forty-nine million, six hundred forty-three thousand, one hundred nine".