4921009 has 2 divisors, whose sum is σ = 4921010. Its totient is φ = 4921008.

The previous prime is 4920991. The next prime is 4921027. The reversal of 4921009 is 9001294.

It is a balanced prime because it is at equal distance from previous prime (4920991) and next prime (4921027).

It can be written as a sum of positive squares in only one way, i.e., 3621409 + 1299600 = 1903^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 4921009 - 2¹¹ = 4918961 is a prime.

It is not a weakly prime, because it can be changed into another prime (4921079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460504 + 2460505.

It is an arithmetic number, because the mean of its divisors is an integer number (2460505).

Almost surely, 2^4921009 is an apocalyptic number.

It is an amenable number.

4921009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4921009 is an equidigital number, since it uses as much as digits as its factorization.

4921009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 4921009 is about 2218.3347357872. The cubic root of 4921009 is about 170.0923258586.

The spelling of 4921009 in words is "four million, nine hundred twenty-one thousand, nine".