4005297409 has 2 divisors, whose sum is σ = 4005297410. Its totient is φ = 4005297408.

The previous prime is 4005297383. The next prime is 4005297437. The reversal of 4005297409 is 9047925004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3622234225 + 383063184 = 60185^2 + 19572^2 .

It is a cyclic number.

It is not a de Polignac number, because 4005297409 - 2¹⁷ = 4005166337 is a prime.

It is a super-2 number, since 2×4005297409² = 32084814669084226562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4005297209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002648704 + 2002648705.

It is an arithmetic number, because the mean of its divisors is an integer number (2002648705).

Almost surely, 2^4005297409 is an apocalyptic number.

It is an amenable number.

4005297409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4005297409 is an equidigital number, since it uses as much as digits as its factorization.

4005297409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 4005297409 is about 63287.4190420181. The cubic root of 4005297409 is about 1588.1015022298.

The spelling of 4005297409 in words is "four billion, five million, two hundred ninety-seven thousand, four hundred nine".