50638409 has 2 divisors, whose sum is σ = 50638410. Its totient is φ = 50638408.

The previous prime is 50638397. The next prime is 50638417. The reversal of 50638409 is 90483605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 6615184 = 6635^2 + 2572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50638409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50638009) 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, 25319204 + 25319205.

It is an arithmetic number, because the mean of its divisors is an integer number (25319205).

Almost surely, 2^50638409 is an apocalyptic number.

It is an amenable number.

50638409 is a deficient number, since it is larger than the sum of its proper divisors (1).

50638409 is an equidigital number, since it uses as much as digits as its factorization.

50638409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 50638409 is about 7116.0669614612. The cubic root of 50638409 is about 369.9644694394.

The spelling of 50638409 in words is "fifty million, six hundred thirty-eight thousand, four hundred nine".