842368817 has 2 divisors, whose sum is σ = 842368818. Its totient is φ = 842368816.

The previous prime is 842368799. The next prime is 842368831. The reversal of 842368817 is 718863248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530104576 + 312264241 = 23024^2 + 17671^2 .

It is a cyclic number.

It is not a de Polignac number, because 842368817 - 2¹⁶ = 842303281 is a prime.

It is not a weakly prime, because it can be changed into another prime (842368837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421184408 + 421184409.

It is an arithmetic number, because the mean of its divisors is an integer number (421184409).

Almost surely, 2^842368817 is an apocalyptic number.

It is an amenable number.

842368817 is a deficient number, since it is larger than the sum of its proper divisors (1).

842368817 is an equidigital number, since it uses as much as digits as its factorization.

842368817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 47.

The square root of 842368817 is about 29023.5906979133. The cubic root of 842368817 is about 944.4248964776.

The spelling of 842368817 in words is "eight hundred forty-two million, three hundred sixty-eight thousand, eight hundred seventeen".