402201209 has 2 divisors, whose sum is σ = 402201210. Its totient is φ = 402201208.

The previous prime is 402201197. The next prime is 402201221. The reversal of 402201209 is 902102204.

It is a balanced prime because it is at equal distance from previous prime (402201197) and next prime (402201221).

It can be written as a sum of positive squares in only one way, i.e., 402122809 + 78400 = 20053^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 402201209 - 2²⁴ = 385423993 is a prime.

It is not a weakly prime, because it can be changed into another prime (402206209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201100604 + 201100605.

It is an arithmetic number, because the mean of its divisors is an integer number (201100605).

Almost surely, 2^402201209 is an apocalyptic number.

It is an amenable number.

402201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

402201209 is an equidigital number, since it uses as much as digits as its factorization.

402201209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 402201209 is about 20054.9547244565. The cubic root of 402201209 is about 738.1553819513.

The spelling of 402201209 in words is "four hundred two million, two hundred one thousand, two hundred nine".