49808989 has 2 divisors, whose sum is σ = 49808990. Its totient is φ = 49808988.

The previous prime is 49808981. The next prime is 49809017. The reversal of 49808989 is 98980894.

49808989 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., 42680089 + 7128900 = 6533^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 49808989 - 2³ = 49808981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49808981) 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, 24904494 + 24904495.

It is an arithmetic number, because the mean of its divisors is an integer number (24904495).

Almost surely, 2^49808989 is an apocalyptic number.

It is an amenable number.

49808989 is a deficient number, since it is larger than the sum of its proper divisors (1).

49808989 is an equidigital number, since it uses as much as digits as its factorization.

49808989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 49808989 is about 7057.5483703620. The cubic root of 49808989 is about 367.9334241764.

The spelling of 49808989 in words is "forty-nine million, eight hundred eight thousand, nine hundred eighty-nine".