49939143 has 4 divisors (see below), whose sum is σ = 66585528. Its totient is φ = 33292760.

The previous prime is 49939133. The next prime is 49939151. The reversal of 49939143 is 34193994.

49939143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49939143 - 2⁵ = 49939111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49939095 and 49939104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49939133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8323188 + ... + 8323193.

It is an arithmetic number, because the mean of its divisors is an integer number (16646382).

Almost surely, 2^49939143 is an apocalyptic number.

49939143 is a deficient number, since it is larger than the sum of its proper divisors (16646385).

49939143 is a wasteful number, since it uses less digits than its factorization.

49939143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16646384.

The product of its digits is 104976, while the sum is 42.

The square root of 49939143 is about 7066.7632619184. The cubic root of 49939143 is about 368.2536231127.

The spelling of 49939143 in words is "forty-nine million, nine hundred thirty-nine thousand, one hundred forty-three".