50543989 has 2 divisors, whose sum is σ = 50543990. Its totient is φ = 50543988.

The previous prime is 50543957. The next prime is 50543993. The reversal of 50543989 is 98934505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 9199089 = 6430^2 + 3033^2 .

It is a cyclic number.

It is not a de Polignac number, because 50543989 - 2⁵ = 50543957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50543789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25271994 + 25271995.

It is an arithmetic number, because the mean of its divisors is an integer number (25271995).

Almost surely, 2^50543989 is an apocalyptic number.

It is an amenable number.

50543989 is a deficient number, since it is larger than the sum of its proper divisors (1).

50543989 is an equidigital number, since it uses as much as digits as its factorization.

50543989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 50543989 is about 7109.4295833069. The cubic root of 50543989 is about 369.7343820429.

It can be divided in two parts, 505 and 43989, that multiplied together give a triangular number (22214445 = T₆₆₆₅).

The spelling of 50543989 in words is "fifty million, five hundred forty-three thousand, nine hundred eighty-nine".