50639779 has 2 divisors, whose sum is σ = 50639780. Its totient is φ = 50639778.

The previous prime is 50639777. The next prime is 50639801. The reversal of 50639779 is 97793605.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50639779 - 2¹ = 50639777 is a prime.

Together with 50639777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50639777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25319889 + 25319890.

It is an arithmetic number, because the mean of its divisors is an integer number (25319890).

Almost surely, 2^50639779 is an apocalyptic number.

50639779 is a deficient number, since it is larger than the sum of its proper divisors (1).

50639779 is an equidigital number, since it uses as much as digits as its factorization.

50639779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 50639779 is about 7116.1632218493. The cubic root of 50639779 is about 369.9678058183.

The spelling of 50639779 in words is "fifty million, six hundred thirty-nine thousand, seven hundred seventy-nine".