50427989 has 2 divisors, whose sum is σ = 50427990. Its totient is φ = 50427988.

The previous prime is 50427977. The next prime is 50428051. The reversal of 50427989 is 98972405.

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., 47679025 + 2748964 = 6905^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 50427989 - 2⁴ = 50427973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50417989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25213994 + 25213995.

It is an arithmetic number, because the mean of its divisors is an integer number (25213995).

Almost surely, 2^50427989 is an apocalyptic number.

It is an amenable number.

50427989 is a deficient number, since it is larger than the sum of its proper divisors (1).

50427989 is an equidigital number, since it uses as much as digits as its factorization.

50427989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 50427989 is about 7101.2667179877. The cubic root of 50427989 is about 369.4513148129.

It can be divided in two parts, 5042 and 7989, that added together give a palindrome (13031).

The spelling of 50427989 in words is "fifty million, four hundred twenty-seven thousand, nine hundred eighty-nine".