4781647 has 4 divisors (see below), whose sum is σ = 5149480. Its totient is φ = 4413816.

The previous prime is 4781629. The next prime is 4781653. The reversal of 4781647 is 7461874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4781647 - 2⁷ = 4781519 is a prime.

It is a Duffinian number.

4781647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781047) 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 3 ways as a sum of consecutive naturals, for example, 183897 + ... + 183922.

It is an arithmetic number, because the mean of its divisors is an integer number (1287370).

Almost surely, 2^4781647 is an apocalyptic number.

4781647 is a deficient number, since it is larger than the sum of its proper divisors (367833).

4781647 is a wasteful number, since it uses less digits than its factorization.

4781647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367832.

The product of its digits is 37632, while the sum is 37.

The square root of 4781647 is about 2186.6977386004. The cubic root of 4781647 is about 168.4712651356.

The spelling of 4781647 in words is "four million, seven hundred eighty-one thousand, six hundred forty-seven".