842676817 has 2 divisors, whose sum is σ = 842676818. Its totient is φ = 842676816.

The previous prime is 842676781. The next prime is 842676869. The reversal of 842676817 is 718676248.

It is a happy number.

Together with previous prime (842676781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 756855121 + 85821696 = 27511^2 + 9264^2 .

It is a cyclic number.

It is not a de Polignac number, because 842676817 - 2¹⁹ = 842152529 is a prime.

It is not a weakly prime, because it can be changed into another prime (842676017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421338408 + 421338409.

It is an arithmetic number, because the mean of its divisors is an integer number (421338409).

Almost surely, 2^842676817 is an apocalyptic number.

It is an amenable number.

842676817 is a deficient number, since it is larger than the sum of its proper divisors (1).

842676817 is an equidigital number, since it uses as much as digits as its factorization.

842676817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 49.

The square root of 842676817 is about 29028.8962415039. The cubic root of 842676817 is about 944.5399875625.

The spelling of 842676817 in words is "eight hundred forty-two million, six hundred seventy-six thousand, eight hundred seventeen".