49780189 has 2 divisors, whose sum is σ = 49780190. Its totient is φ = 49780188.

The previous prime is 49780187. The next prime is 49780219. The reversal of 49780189 is 98108794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39476089 + 10304100 = 6283^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 49780189 - 2¹ = 49780187 is a prime.

Together with 49780187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49780187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24890094 + 24890095.

It is an arithmetic number, because the mean of its divisors is an integer number (24890095).

Almost surely, 2^49780189 is an apocalyptic number.

It is an amenable number.

49780189 is a deficient number, since it is larger than the sum of its proper divisors (1).

49780189 is an equidigital number, since it uses as much as digits as its factorization.

49780189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 49780189 is about 7055.5077067494. The cubic root of 49780189 is about 367.8624963793.

The spelling of 49780189 in words is "forty-nine million, seven hundred eighty thousand, one hundred eighty-nine".