50505409 has 2 divisors, whose sum is σ = 50505410. Its totient is φ = 50505408.

The previous prime is 50505397. The next prime is 50505431. The reversal of 50505409 is 90450505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42211009 + 8294400 = 6497^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 50505409 - 2²³ = 42116801 is a prime.

It is not a weakly prime, because it can be changed into another prime (50505109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25252704 + 25252705.

It is an arithmetic number, because the mean of its divisors is an integer number (25252705).

Almost surely, 2^50505409 is an apocalyptic number.

It is an amenable number.

50505409 is a deficient number, since it is larger than the sum of its proper divisors (1).

50505409 is an equidigital number, since it uses as much as digits as its factorization.

50505409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 50505409 is about 7106.7157674977. The cubic root of 50505409 is about 369.6402858995.

The spelling of 50505409 in words is "fifty million, five hundred five thousand, four hundred nine".