49921139 has 8 divisors (see below), whose sum is σ = 50984640. Its totient is φ = 48865000.

The previous prime is 49921117. The next prime is 49921141. The reversal of 49921139 is 93112994.

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 49921139 - 2⁸ = 49920883 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 13124 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (6373080).

Almost surely, 2^49921139 is an apocalyptic number.

49921139 is a deficient number, since it is larger than the sum of its proper divisors (1063501).

49921139 is a wasteful number, since it uses less digits than its factorization.

49921139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681.

The product of its digits is 17496, while the sum is 38.

The square root of 49921139 is about 7065.4892965739. The cubic root of 49921139 is about 368.2093636751.

The spelling of 49921139 in words is "forty-nine million, nine hundred twenty-one thousand, one hundred thirty-nine".