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49771 = 71701

49771 has 4 divisors (see below), whose sum is σ = 50544. Its totient is φ = 49000.

The previous prime is 49757. The next prime is 49783. The reversal of 49771 is 17794.

49771 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 3-Lehmer number, since φ(49771) divides (49771-1)3.

It is a cyclic number.

It is not a de Polignac number, because 49771 - 25 = 49739 is a prime.

It is a pancake number, because a pancake can be divided into 49771 parts by 315 straight cuts.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (49711) 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, 280 + ... + 421.

It is an arithmetic number, because the mean of its divisors is an integer number (12636).

249771 is an apocalyptic number.

49771 is a deficient number, since it is larger than the sum of its proper divisors (773).

49771 is an equidigital number, since it uses as much as digits as its factorization.

49771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772.

The product of its digits is 1764, while the sum is 28.

The square root of 49771 is about 223.0941505284. The cubic root of 49771 is about 36.7839860222.

It can be divided in two parts, 49 and 771, that added together give a triangular number (820 = T40).

The spelling of 49771 in words is "forty-nine thousand, seven hundred seventy-one".

Divisors: 1 71 701 49771