49518909 has 24 divisors (see below), whose sum is σ = 82622592. Its totient is φ = 28245120.

The previous prime is 49518901. The next prime is 49518919. The reversal of 49518909 is 90981594.

49518909 is a `hidden beast` number, since 49 + 518 + 90 + 9 = 666.

It is not a de Polignac number, because 49518909 - 2³ = 49518901 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 (49518901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13029 + ... + 16394.

It is an arithmetic number, because the mean of its divisors is an integer number (3442608).

Almost surely, 2^49518909 is an apocalyptic number.

It is an amenable number.

49518909 is a deficient number, since it is larger than the sum of its proper divisors (33103683).

49518909 is a wasteful number, since it uses less digits than its factorization.

49518909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29457 (or 29454 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 49518909 is about 7036.9673155415. The cubic root of 49518909 is about 367.2177702608.

The spelling of 49518909 in words is "forty-nine million, five hundred eighteen thousand, nine hundred nine".