842331961 has 2 divisors, whose sum is σ = 842331962. Its totient is φ = 842331960.

The previous prime is 842331949. The next prime is 842331989. The reversal of 842331961 is 169133248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 839898361 + 2433600 = 28981^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 842331961 - 2¹⁵ = 842299193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842331961.

It is not a weakly prime, because it can be changed into another prime (842331661) 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, 421165980 + 421165981.

It is an arithmetic number, because the mean of its divisors is an integer number (421165981).

Almost surely, 2^842331961 is an apocalyptic number.

It is an amenable number.

842331961 is a deficient number, since it is larger than the sum of its proper divisors (1).

842331961 is an equidigital number, since it uses as much as digits as its factorization.

842331961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 842331961 is about 29022.9557591917. The cubic root of 842331961 is about 944.4111225301.

The spelling of 842331961 in words is "eight hundred forty-two million, three hundred thirty-one thousand, nine hundred sixty-one".