49817 has 4 divisors (see below), whose sum is σ = 51456. Its totient is φ = 48180.

The previous prime is 49811. The next prime is 49823. The reversal of 49817 is 71894.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (49811) and next prime (49823).

It is a cyclic number.

It is not a de Polignac number, because 49817 - 2⁴ = 49801 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 49817.

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, 773 + ... + 834.

It is an arithmetic number, because the mean of its divisors is an integer number (12864).

2⁴⁹⁸¹⁷ is an apocalyptic number.

It is an amenable number.

49817 is a deficient number, since it is larger than the sum of its proper divisors (1639).

49817 is a wasteful number, since it uses less digits than its factorization.

49817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its digits is 2016, while the sum is 29.

The square root of 49817 is about 223.1972222049. The cubic root of 49817 is about 36.7953148572.

It can be divided in two parts, 498 and 17, that added together give a palindrome (515).

The spelling of 49817 in words is "forty-nine thousand, eight hundred seventeen".