49689 has 6 divisors (see below), whose sum is σ = 71786. Its totient is φ = 33120.

The previous prime is 49681. The next prime is 49697. The reversal of 49689 is 98694.

It is an interprime number because it is at equal distance from previous prime (49681) and next prime (49697).

It can be written as a sum of positive squares in only one way, i.e., 38025 + 11664 = 195^2 + 108^2 .

It is not a de Polignac number, because 49689 - 2³ = 49681 is a prime.

It is a Duffinian number.

49689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (49681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2752 + ... + 2769.

2⁴⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

49689 is a deficient number, since it is larger than the sum of its proper divisors (22097).

49689 is a wasteful number, since it uses less digits than its factorization.

49689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527 (or 5524 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 49689 is about 222.9102958591. The cubic root of 49689 is about 36.7637738179.

It can be divided in two parts, 496 and 89, that multiplied together give a palindrome (44144).

The spelling of 49689 in words is "forty-nine thousand, six hundred eighty-nine".