49309909 has 16 divisors (see below), whose sum is σ = 55443456. Its totient is φ = 43470000.

The previous prime is 49309903. The next prime is 49309913. The reversal of 49309909 is 90990394.

49309909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 49309909 - 2⁹ = 49309397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49309903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65284 + ... + 66034.

It is an arithmetic number, because the mean of its divisors is an integer number (3465216).

Almost surely, 2^49309909 is an apocalyptic number.

It is an amenable number.

49309909 is a deficient number, since it is larger than the sum of its proper divisors (6133547).

49309909 is a wasteful number, since it uses less digits than its factorization.

49309909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 49309909 is about 7022.1014660855. The cubic root of 49309909 is about 366.7004140656.

The spelling of 49309909 in words is "forty-nine million, three hundred nine thousand, nine hundred nine".