49818609 has 6 divisors (see below), whose sum is σ = 71960226. Its totient is φ = 33212400.

The previous prime is 49818599. The next prime is 49818617. The reversal of 49818609 is 90681894.

It can be written as a sum of positive squares in only one way, i.e., 47568609 + 2250000 = 6897^2 + 1500^2 .

It is not a de Polignac number, because 49818609 - 2⁷ = 49818481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49818689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2767692 + ... + 2767709.

It is an arithmetic number, because the mean of its divisors is an integer number (11993371).

Almost surely, 2^49818609 is an apocalyptic number.

It is an amenable number.

49818609 is a deficient number, since it is larger than the sum of its proper divisors (22141617).

49818609 is a wasteful number, since it uses less digits than its factorization.

49818609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535407 (or 5535404 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 49818609 is about 7058.2298772426. The cubic root of 49818609 is about 367.9571099392.

The spelling of 49818609 in words is "forty-nine million, eight hundred eighteen thousand, six hundred nine".