49813 has 4 divisors (see below), whose sum is σ = 50380. Its totient is φ = 49248.

The previous prime is 49811. The next prime is 49823. The reversal of 49813 is 31894.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 39204 + 10609 = 198^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 49813 - 2¹ = 49811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (12595).

2⁴⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

49813 is a deficient number, since it is larger than the sum of its proper divisors (567).

49813 is a wasteful number, since it uses less digits than its factorization.

49813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its digits is 864, while the sum is 25.

The square root of 49813 is about 223.1882613401. The cubic root of 49813 is about 36.7943300181.

The spelling of 49813 in words is "forty-nine thousand, eight hundred thirteen".