842778353 has 2 divisors, whose sum is σ = 842778354. Its totient is φ = 842778352.

The previous prime is 842778289. The next prime is 842778373. The reversal of 842778353 is 353877248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425679424 + 417098929 = 20632^2 + 20423^2 .

It is a cyclic number.

It is not a de Polignac number, because 842778353 - 2⁶ = 842778289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842778298 and 842778307.

It is not a weakly prime, because it can be changed into another prime (842778373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421389176 + 421389177.

It is an arithmetic number, because the mean of its divisors is an integer number (421389177).

Almost surely, 2^842778353 is an apocalyptic number.

It is an amenable number.

842778353 is a deficient number, since it is larger than the sum of its proper divisors (1).

842778353 is an equidigital number, since it uses as much as digits as its factorization.

842778353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 47.

The square root of 842778353 is about 29030.6450668944. The cubic root of 842778353 is about 944.5779226120.

The spelling of 842778353 in words is "eight hundred forty-two million, seven hundred seventy-eight thousand, three hundred fifty-three".