49917891 has 8 divisors (see below), whose sum is σ = 67813200. Its totient is φ = 32650592.

The previous prime is 49917877. The next prime is 49917913. The reversal of 49917891 is 19871994.

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

It is a cyclic number.

It is not a de Polignac number, because 49917891 - 2⁶ = 49917827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49917891.

It is not an unprimeable number, because it can be changed into a prime (49917811) 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, 156816 + ... + 157133.

It is an arithmetic number, because the mean of its divisors is an integer number (8476650).

Almost surely, 2^49917891 is an apocalyptic number.

49917891 is a deficient number, since it is larger than the sum of its proper divisors (17895309).

49917891 is a wasteful number, since it uses less digits than its factorization.

49917891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314005.

The product of its digits is 163296, while the sum is 48.

The square root of 49917891 is about 7065.2594432193. The cubic root of 49917891 is about 368.2013779469.

The spelling of 49917891 in words is "forty-nine million, nine hundred seventeen thousand, eight hundred ninety-one".