4042321009 has 2 divisors, whose sum is σ = 4042321010. Its totient is φ = 4042321008.

The previous prime is 4042320967. The next prime is 4042321033. The reversal of 4042321009 is 9001232404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4031615025 + 10705984 = 63495^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042321009 - 2¹³ = 4042312817 is a prime.

It is not a weakly prime, because it can be changed into another prime (4042324009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021160504 + 2021160505.

It is an arithmetic number, because the mean of its divisors is an integer number (2021160505).

Almost surely, 2^4042321009 is an apocalyptic number.

It is an amenable number.

4042321009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042321009 is an equidigital number, since it uses as much as digits as its factorization.

4042321009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 4042321009 is about 63579.2498304282. The cubic root of 4042321009 is about 1592.9797910124.

The spelling of 4042321009 in words is "four billion, forty-two million, three hundred twenty-one thousand, nine".