49684609 has 4 divisors (see below), whose sum is σ = 53506516. Its totient is φ = 45862704.

The previous prime is 49684589. The next prime is 49684619. The reversal of 49684609 is 90648694.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90648694 = 2 ⋅45324347.

It can be written as a sum of positive squares in 2 ways, for example, as 28090000 + 21594609 = 5300^2 + 4647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49684609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49684619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910934 + ... + 1910959.

It is an arithmetic number, because the mean of its divisors is an integer number (13376629).

Almost surely, 2^49684609 is an apocalyptic number.

It is an amenable number.

49684609 is a deficient number, since it is larger than the sum of its proper divisors (3821907).

49684609 is a wasteful number, since it uses less digits than its factorization.

49684609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821906.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 49684609 is about 7048.7310205455. The cubic root of 49684609 is about 367.6269085198.

The spelling of 49684609 in words is "forty-nine million, six hundred eighty-four thousand, six hundred nine".