47909939 has 16 divisors (see below), whose sum is σ = 60016896. Its totient is φ = 37154400.

The previous prime is 47909929. The next prime is 47909977. The reversal of 47909939 is 93990974.

47909939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 47909939 - 2¹² = 47905843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47909929) 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 in 15 ways as a sum of consecutive naturals, for example, 16109 + ... + 18849.

It is an arithmetic number, because the mean of its divisors is an integer number (3751056).

Almost surely, 2^47909939 is an apocalyptic number.

47909939 is a deficient number, since it is larger than the sum of its proper divisors (12106957).

47909939 is a wasteful number, since it uses less digits than its factorization.

47909939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 47909939 is about 6921.7005858387. The cubic root of 47909939 is about 363.1966822384.

The spelling of 47909939 in words is "forty-seven million, nine hundred nine thousand, nine hundred thirty-nine".