842181073 has 2 divisors, whose sum is σ = 842181074. Its totient is φ = 842181072.

The previous prime is 842181049. The next prime is 842181091. The reversal of 842181073 is 370181248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840014289 + 2166784 = 28983^2 + 1472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842181073 is a prime.

It is not a weakly prime, because it can be changed into another prime (842182073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421090536 + 421090537.

It is an arithmetic number, because the mean of its divisors is an integer number (421090537).

Almost surely, 2^842181073 is an apocalyptic number.

It is an amenable number.

842181073 is a deficient number, since it is larger than the sum of its proper divisors (1).

842181073 is an equidigital number, since it uses as much as digits as its factorization.

842181073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 842181073 is about 29020.3561832035. The cubic root of 842181073 is about 944.3547279724.

The spelling of 842181073 in words is "eight hundred forty-two million, one hundred eighty-one thousand, seventy-three".