49766721 has 4 divisors (see below), whose sum is σ = 66355632. Its totient is φ = 33177812.

The previous prime is 49766713. The next prime is 49766747. The reversal of 49766721 is 12766794.

49766721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49766721 - 2³ = 49766713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49766771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8294451 + ... + 8294456.

It is an arithmetic number, because the mean of its divisors is an integer number (16588908).

Almost surely, 2^49766721 is an apocalyptic number.

It is an amenable number.

49766721 is a deficient number, since it is larger than the sum of its proper divisors (16588911).

49766721 is a wasteful number, since it uses less digits than its factorization.

49766721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16588910.

The product of its digits is 127008, while the sum is 42.

The square root of 49766721 is about 7054.5532105159. The cubic root of 49766721 is about 367.8293183951.

The spelling of 49766721 in words is "forty-nine million, seven hundred sixty-six thousand, seven hundred twenty-one".