49639191 has 32 divisors (see below), whose sum is σ = 81346560. Its totient is φ = 26290656.

The previous prime is 49639171. The next prime is 49639193. The reversal of 49639191 is 19193694.

It is not a de Polignac number, because 49639191 - 2¹¹ = 49637143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639193) 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 31 ways as a sum of consecutive naturals, for example, 17430 + ... + 20076.

It is an arithmetic number, because the mean of its divisors is an integer number (2542080).

Almost surely, 2^49639191 is an apocalyptic number.

49639191 is a deficient number, since it is larger than the sum of its proper divisors (31707369).

49639191 is a wasteful number, since it uses less digits than its factorization.

49639191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723.

The product of its digits is 52488, while the sum is 42.

The square root of 49639191 is about 7045.5085692943. The cubic root of 49639191 is about 367.5148552466.

The spelling of 49639191 in words is "forty-nine million, six hundred thirty-nine thousand, one hundred ninety-one".