47909477 has 16 divisors (see below), whose sum is σ = 61661184. Its totient is φ = 36126000.

The previous prime is 47909473. The next prime is 47909503. The reversal of 47909477 is 77490974.

47909477 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 47909477 - 2² = 47909473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47909473) 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, 7649 + ... + 12422.

It is an arithmetic number, because the mean of its divisors is an integer number (3853824).

Almost surely, 2^47909477 is an apocalyptic number.

It is an amenable number.

47909477 is a deficient number, since it is larger than the sum of its proper divisors (13751707).

47909477 is a wasteful number, since it uses less digits than its factorization.

47909477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20120.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 47909477 is about 6921.6672124568. The cubic root of 47909477 is about 363.1955147882.

The spelling of 47909477 in words is "forty-seven million, nine hundred nine thousand, four hundred seventy-seven".