402230009 has 2 divisors, whose sum is σ = 402230010. Its totient is φ = 402230008.

The previous prime is 402229987. The next prime is 402230033. The reversal of 402230009 is 900032204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269058409 + 133171600 = 16403^2 + 11540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402230009 is a prime.

It is not a weakly prime, because it can be changed into another prime (402230099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201115004 + 201115005.

It is an arithmetic number, because the mean of its divisors is an integer number (201115005).

Almost surely, 2^402230009 is an apocalyptic number.

It is an amenable number.

402230009 is a deficient number, since it is larger than the sum of its proper divisors (1).

402230009 is an equidigital number, since it uses as much as digits as its factorization.

402230009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 402230009 is about 20055.6727386543. The cubic root of 402230009 is about 738.1730003034.

The spelling of 402230009 in words is "four hundred two million, two hundred thirty thousand, nine".