49920891 has 16 divisors (see below), whose sum is σ = 70681248. Its totient is φ = 31232000.

The previous prime is 49920883. The next prime is 49920911. The reversal of 49920891 is 19802994.

It is a cyclic number.

It is not a de Polignac number, because 49920891 - 2³ = 49920883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49920841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19231 + ... + 21671.

It is an arithmetic number, because the mean of its divisors is an integer number (4417578).

Almost surely, 2^49920891 is an apocalyptic number.

49920891 is a deficient number, since it is larger than the sum of its proper divisors (20760357).

49920891 is a wasteful number, since it uses less digits than its factorization.

49920891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862.

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

The square root of 49920891 is about 7065.4717464583. The cubic root of 49920891 is about 368.2087539396.

The spelling of 49920891 in words is "forty-nine million, nine hundred twenty thousand, eight hundred ninety-one".