402817 has 2 divisors, whose sum is σ = 402818. Its totient is φ = 402816.

The previous prime is 402803. The next prime is 402823. The reversal of 402817 is 718204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361201 + 41616 = 601^2 + 204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402817 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (402847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201408 + 201409.

It is an arithmetic number, because the mean of its divisors is an integer number (201409).

2⁴⁰²⁸¹⁷ is an apocalyptic number.

It is an amenable number.

402817 is a deficient number, since it is larger than the sum of its proper divisors (1).

402817 is an equidigital number, since it uses as much as digits as its factorization.

402817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 402817 is about 634.6786588503. The cubic root of 402817 is about 73.8531907969.

The spelling of 402817 in words is "four hundred two thousand, eight hundred seventeen".