49678681 has 4 divisors (see below), whose sum is σ = 53500132. Its totient is φ = 45857232.

The previous prime is 49678661. The next prime is 49678693. The reversal of 49678681 is 18687694.

49678681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8462281 + 41216400 = 2909^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 49678681 - 2⁷ = 49678553 is a prime.

It is a super-2 number, since 2×49678681² = 4935942691799522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49678621) 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 3 ways as a sum of consecutive naturals, for example, 1910706 + ... + 1910731.

It is an arithmetic number, because the mean of its divisors is an integer number (13375033).

Almost surely, 2^49678681 is an apocalyptic number.

It is an amenable number.

49678681 is a deficient number, since it is larger than the sum of its proper divisors (3821451).

49678681 is a wasteful number, since it uses less digits than its factorization.

49678681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821450.

The product of its digits is 580608, while the sum is 49.

The square root of 49678681 is about 7048.3105067810. The cubic root of 49678681 is about 367.6122870972.

The spelling of 49678681 in words is "forty-nine million, six hundred seventy-eight thousand, six hundred eighty-one".