49921191 has 42 divisors (see below), whose sum is σ = 78940832. Its totient is φ = 31521960.

The previous prime is 49921141. The next prime is 49921199. The reversal of 49921191 is 19112994.

It is not a de Polignac number, because 49921191 - 2¹¹ = 49919143 is a prime.

It is a Duffinian number.

Its product of digits (5832) is a multiple of the sum of its prime divisors (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49921199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 1062130 + ... + 1062176.

Almost surely, 2^49921191 is an apocalyptic number.

49921191 is a deficient number, since it is larger than the sum of its proper divisors (29019641).

49921191 is an frugal number, since it uses more digits than its factorization.

49921191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 81 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 49921191 is about 7065.4929764313. The cubic root of 49921191 is about 368.2094915227.

The spelling of 49921191 in words is "forty-nine million, nine hundred twenty-one thousand, one hundred ninety-one".