50388509 has 2 divisors, whose sum is σ = 50388510. Its totient is φ = 50388508.

The previous prime is 50388449. The next prime is 50388511. The reversal of 50388509 is 90588305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 120409 = 7090^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 50388509 - 2⁸ = 50388253 is a prime.

Together with 50388511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50388529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25194254 + 25194255.

It is an arithmetic number, because the mean of its divisors is an integer number (25194255).

Almost surely, 2^50388509 is an apocalyptic number.

It is an amenable number.

50388509 is a deficient number, since it is larger than the sum of its proper divisors (1).

50388509 is an equidigital number, since it uses as much as digits as its factorization.

50388509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 50388509 is about 7098.4863879562. The cubic root of 50388509 is about 369.3548753402.

The spelling of 50388509 in words is "fifty million, three hundred eighty-eight thousand, five hundred nine".