842827813 has 2 divisors, whose sum is σ = 842827814. Its totient is φ = 842827812.

The previous prime is 842827787. The next prime is 842827823. The reversal of 842827813 is 318728248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839666529 + 3161284 = 28977^2 + 1778^2 .

It is a cyclic number.

It is not a de Polignac number, because 842827813 - 2⁵ = 842827781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842827813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842827823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421413906 + 421413907.

It is an arithmetic number, because the mean of its divisors is an integer number (421413907).

Almost surely, 2^842827813 is an apocalyptic number.

It is an amenable number.

842827813 is a deficient number, since it is larger than the sum of its proper divisors (1).

842827813 is an equidigital number, since it uses as much as digits as its factorization.

842827813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 43.

The square root of 842827813 is about 29031.4969128359. The cubic root of 842827813 is about 944.5964003490.

The spelling of 842827813 in words is "eight hundred forty-two million, eight hundred twenty-seven thousand, eight hundred thirteen".