402004217 has 2 divisors, whose sum is σ = 402004218. Its totient is φ = 402004216.

The previous prime is 402004199. The next prime is 402004247. The reversal of 402004217 is 712400204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360582121 + 41422096 = 18989^2 + 6436^2 .

It is a cyclic number.

It is not a de Polignac number, because 402004217 - 2⁸ = 402003961 is a prime.

It is not a weakly prime, because it can be changed into another prime (402004247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201002108 + 201002109.

It is an arithmetic number, because the mean of its divisors is an integer number (201002109).

Almost surely, 2^402004217 is an apocalyptic number.

It is an amenable number.

402004217 is a deficient number, since it is larger than the sum of its proper divisors (1).

402004217 is an equidigital number, since it uses as much as digits as its factorization.

402004217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 402004217 is about 20050.0428179094. The cubic root of 402004217 is about 738.0348498659.

The spelling of 402004217 in words is "four hundred two million, four thousand, two hundred seventeen".