49986143 has 4 divisors (see below), whose sum is σ = 50025360. Its totient is φ = 49946928.

The previous prime is 49986127. The next prime is 49986151. The reversal of 49986143 is 34168994.

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 49986143 - 2⁴ = 49986127 is a prime.

It is a super-2 number, since 2×49986143² = 4997228984032898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49986094 and 49986103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49986113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17630 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (12506340).

Almost surely, 2^49986143 is an apocalyptic number.

49986143 is a deficient number, since it is larger than the sum of its proper divisors (39217).

49986143 is a wasteful number, since it uses less digits than its factorization.

49986143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39216.

The product of its digits is 186624, while the sum is 44.

The square root of 49986143 is about 7070.0879061013. The cubic root of 49986143 is about 368.3691136366.

The spelling of 49986143 in words is "forty-nine million, nine hundred eighty-six thousand, one hundred forty-three".