49809921 has 24 divisors (see below), whose sum is σ = 77757120. Its totient is φ = 28278432.

The previous prime is 49809919. The next prime is 49809931. The reversal of 49809921 is 12990894.

It is not a de Polignac number, because 49809921 - 2¹ = 49809919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49809911) 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, 23535 + ... + 25563.

It is an arithmetic number, because the mean of its divisors is an integer number (3239880).

Almost surely, 2^49809921 is an apocalyptic number.

It is an amenable number.

49809921 is a deficient number, since it is larger than the sum of its proper divisors (27947199).

49809921 is a wasteful number, since it uses less digits than its factorization.

49809921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 49809921 is about 7057.6143986477. The cubic root of 49809921 is about 367.9357190220.

The spelling of 49809921 in words is "forty-nine million, eight hundred nine thousand, nine hundred twenty-one".