4781909 has 4 divisors (see below), whose sum is σ = 5216640. Its totient is φ = 4347180.

The previous prime is 4781873. The next prime is 4781911. The reversal of 4781909 is 9091874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4781909 - 2⁸ = 4781653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4781929) 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, 217349 + ... + 217370.

It is an arithmetic number, because the mean of its divisors is an integer number (1304160).

Almost surely, 2^4781909 is an apocalyptic number.

It is an amenable number.

4781909 is a deficient number, since it is larger than the sum of its proper divisors (434731).

4781909 is a wasteful number, since it uses less digits than its factorization.

4781909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434730.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 4781909 is about 2186.7576454651. The cubic root of 4781909 is about 168.4743420855.

The spelling of 4781909 in words is "four million, seven hundred eighty-one thousand, nine hundred nine".