49689221 has 2 divisors, whose sum is σ = 49689222. Its totient is φ = 49689220.

The previous prime is 49689203. The next prime is 49689247. The reversal of 49689221 is 12298694.

49689221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 2217121 = 6890^2 + 1489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49689221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49689251) 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 as a sum of consecutive naturals, namely, 24844610 + 24844611.

It is an arithmetic number, because the mean of its divisors is an integer number (24844611).

Almost surely, 2^49689221 is an apocalyptic number.

It is an amenable number.

49689221 is a deficient number, since it is larger than the sum of its proper divisors (1).

49689221 is an equidigital number, since it uses as much as digits as its factorization.

49689221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 49689221 is about 7049.0581640387. The cubic root of 49689221 is about 367.6382832217.

The spelling of 49689221 in words is "forty-nine million, six hundred eighty-nine thousand, two hundred twenty-one".