49689681 has 8 divisors (see below), whose sum is σ = 66650304. Its totient is φ = 32927760.

The previous prime is 49689641. The next prime is 49689697. The reversal of 49689681 is 18698694.

It is a happy number.

49689681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 49689681 - 2⁹ = 49689169 is a prime.

It is a super-2 number, since 2×49689681² = 4938128795763522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49689641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49090 + ... + 50091.

It is an arithmetic number, because the mean of its divisors is an integer number (8331288).

Almost surely, 2^49689681 is an apocalyptic number.

It is an amenable number.

49689681 is a deficient number, since it is larger than the sum of its proper divisors (16960623).

49689681 is a wasteful number, since it uses less digits than its factorization.

49689681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99351.

The product of its digits is 746496, while the sum is 51.

The square root of 49689681 is about 7049.0907924356. The cubic root of 49689681 is about 367.6394176937.

The spelling of 49689681 in words is "forty-nine million, six hundred eighty-nine thousand, six hundred eighty-one".