842305877813 has 2 divisors, whose sum is σ = 842305877814. Its totient is φ = 842305877812.

The previous prime is 842305877783. The next prime is 842305877969. The reversal of 842305877813 is 318778503248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474587343409 + 367718534404 = 688903^2 + 606398^2 .

It is a cyclic number.

It is not a de Polignac number, because 842305877813 - 2⁸ = 842305877557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842305876813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421152938906 + 421152938907.

It is an arithmetic number, because the mean of its divisors is an integer number (421152938907).

Almost surely, 2^842305877813 is an apocalyptic number.

It is an amenable number.

842305877813 is a deficient number, since it is larger than the sum of its proper divisors (1).

842305877813 is an equidigital number, since it uses as much as digits as its factorization.

842305877813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 842305877813 in words is "eight hundred forty-two billion, three hundred five million, eight hundred seventy-seven thousand, eight hundred thirteen".