49631991 has 8 divisors (see below), whose sum is σ = 66243840. Its totient is φ = 33054072.

The previous prime is 49631977. The next prime is 49632001. The reversal of 49631991 is 19913694.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49631991 - 2⁶ = 49631927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49631941) 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 7 ways as a sum of consecutive naturals, for example, 4845 + ... + 11078.

It is an arithmetic number, because the mean of its divisors is an integer number (8280480).

Almost surely, 2^49631991 is an apocalyptic number.

49631991 is a deficient number, since it is larger than the sum of its proper divisors (16611849).

49631991 is a wasteful number, since it uses less digits than its factorization.

49631991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16965.

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

The square root of 49631991 is about 7044.9975869407. The cubic root of 49631991 is about 367.4970854505.

The spelling of 49631991 in words is "forty-nine million, six hundred thirty-one thousand, nine hundred ninety-one".