49987 has 8 divisors (see below), whose sum is σ = 58976. Its totient is φ = 41472.

The previous prime is 49957. The next prime is 49991. The reversal of 49987 is 78994.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 9-Lehmer number, since φ(49987) divides (49987-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 49987 - 2¹¹ = 47939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (49927) 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 7 ways as a sum of consecutive naturals, for example, 163 + ... + 355.

It is an arithmetic number, because the mean of its divisors is an integer number (7372).

2⁴⁹⁹⁸⁷ is an apocalyptic number.

49987 is a deficient number, since it is larger than the sum of its proper divisors (8989).

49987 is a wasteful number, since it uses less digits than its factorization.

49987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its digits is 18144, while the sum is 37.

The square root of 49987 is about 223.5777269765. The cubic root of 49987 is about 36.8371218824.

It can be divided in two parts, 4998 and 7, that added together give a palindrome (5005).

The spelling of 49987 in words is "forty-nine thousand, nine hundred eighty-seven".