49989681 has 12 divisors (see below), whose sum is σ = 82522752. Its totient is φ = 28565496.

The previous prime is 49989671. The next prime is 49989691. The reversal of 49989681 is 18698994.

49989681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (49989671) and next prime (49989691).

It is not a de Polignac number, because 49989681 - 2¹⁰ = 49988657 is a prime.

It is a super-2 number, since 2×49989681² = 4997936412963522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49989631) 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 11 ways as a sum of consecutive naturals, for example, 396681 + ... + 396806.

It is an arithmetic number, because the mean of its divisors is an integer number (6876896).

Almost surely, 2^49989681 is an apocalyptic number.

It is an amenable number.

49989681 is a deficient number, since it is larger than the sum of its proper divisors (32533071).

49989681 is a wasteful number, since it uses less digits than its factorization.

49989681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793500 (or 793497 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 49989681 is about 7070.3381107271. The cubic root of 49989681 is about 368.3778044397.

The spelling of 49989681 in words is "forty-nine million, nine hundred eighty-nine thousand, six hundred eighty-one".