49405509 has 6 divisors (see below), whose sum is σ = 71363526. Its totient is φ = 32937000.

The previous prime is 49405493. The next prime is 49405511. The reversal of 49405509 is 90550494.

It can be written as a sum of positive squares in only one way, i.e., 45603009 + 3802500 = 6753^2 + 1950^2 .

It is not a de Polignac number, because 49405509 - 2⁴ = 49405493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49405549) 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, 2744742 + ... + 2744759.

It is an arithmetic number, because the mean of its divisors is an integer number (11893921).

Almost surely, 2^49405509 is an apocalyptic number.

It is an amenable number.

49405509 is a deficient number, since it is larger than the sum of its proper divisors (21958017).

49405509 is a wasteful number, since it uses less digits than its factorization.

49405509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489507 (or 5489504 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 49405509 is about 7028.9052490413. The cubic root of 49405509 is about 366.9372422492.

The spelling of 49405509 in words is "forty-nine million, four hundred five thousand, five hundred nine".