50639971 has 2 divisors, whose sum is σ = 50639972. Its totient is φ = 50639970.

The previous prime is 50639947. The next prime is 50640011. The reversal of 50639971 is 17993605.

It is an a-pointer prime, because the next prime (50640011) can be obtained adding 50639971 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50639971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50639371) 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, 25319985 + 25319986.

It is an arithmetic number, because the mean of its divisors is an integer number (25319986).

Almost surely, 2^50639971 is an apocalyptic number.

50639971 is a deficient number, since it is larger than the sum of its proper divisors (1).

50639971 is an equidigital number, since it uses as much as digits as its factorization.

50639971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 50639971 is about 7116.1767122522. The cubic root of 50639971 is about 369.9682733935.

The spelling of 50639971 in words is "fifty million, six hundred thirty-nine thousand, nine hundred seventy-one".