4009747009 has 2 divisors, whose sum is σ = 4009747010. Its totient is φ = 4009747008.

The previous prime is 4009746991. The next prime is 4009747043. The reversal of 4009747009 is 9007479004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3981231409 + 28515600 = 63097^2 + 5340^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009747009 - 2²³ = 4001358401 is a prime.

It is not a weakly prime, because it can be changed into another prime (4009747309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2004873504 + 2004873505.

It is an arithmetic number, because the mean of its divisors is an integer number (2004873505).

Almost surely, 2^4009747009 is an apocalyptic number.

It is an amenable number.

4009747009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4009747009 is an equidigital number, since it uses as much as digits as its factorization.

4009747009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 4009747009 is about 63322.5631903826. The cubic root of 4009747009 is about 1588.6893737888.

The spelling of 4009747009 in words is "four billion, nine million, seven hundred forty-seven thousand, nine".