4781009 has 2 divisors, whose sum is σ = 4781010. Its totient is φ = 4781008.

The previous prime is 4780973. The next prime is 4781011. The reversal of 4781009 is 9001874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4558225 + 222784 = 2135^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 4781009 - 2²⁰ = 3732433 is a prime.

Together with 4781011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4781039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390504 + 2390505.

It is an arithmetic number, because the mean of its divisors is an integer number (2390505).

Almost surely, 2^4781009 is an apocalyptic number.

It is an amenable number.

4781009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4781009 is an equidigital number, since it uses as much as digits as its factorization.

4781009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 4781009 is about 2186.5518516605. The cubic root of 4781009 is about 168.4637719400.

The spelling of 4781009 in words is "four million, seven hundred eighty-one thousand, nine".