50208139 has 2 divisors, whose sum is σ = 50208140. Its totient is φ = 50208138.

The previous prime is 50208131. The next prime is 50208143. The reversal of 50208139 is 93180205.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50208139 - 2³ = 50208131 is a prime.

It is not a weakly prime, because it can be changed into another prime (50208131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25104069 + 25104070.

It is an arithmetic number, because the mean of its divisors is an integer number (25104070).

Almost surely, 2^50208139 is an apocalyptic number.

50208139 is a deficient number, since it is larger than the sum of its proper divisors (1).

50208139 is an equidigital number, since it uses as much as digits as its factorization.

50208139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 50208139 is about 7085.7701769109. The cubic root of 50208139 is about 368.9136359256.

The spelling of 50208139 in words is "fifty million, two hundred eight thousand, one hundred thirty-nine".