49639939 has 2 divisors, whose sum is σ = 49639940. Its totient is φ = 49639938.

The previous prime is 49639907. The next prime is 49639963. The reversal of 49639939 is 93993694.

49639939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49639939 - 2⁵ = 49639907 is a prime.

It is not a weakly prime, because it can be changed into another prime (49639979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24819969 + 24819970.

It is an arithmetic number, because the mean of its divisors is an integer number (24819970).

Almost surely, 2^49639939 is an apocalyptic number.

49639939 is a deficient number, since it is larger than the sum of its proper divisors (1).

49639939 is an equidigital number, since it uses as much as digits as its factorization.

49639939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 52.

The square root of 49639939 is about 7045.5616525583. The cubic root of 49639939 is about 367.5167012324.

The spelling of 49639939 in words is "forty-nine million, six hundred thirty-nine thousand, nine hundred thirty-nine".