842583425921 has 2 divisors, whose sum is σ = 842583425922. Its totient is φ = 842583425920.

The previous prime is 842583425837. The next prime is 842583425927. The reversal of 842583425921 is 129524385248.

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., 752981385025 + 89602040896 = 867745^2 + 299336^2 .

It is a cyclic number.

It is not a de Polignac number, because 842583425921 - 2²² = 842579231617 is a prime.

It is not a weakly prime, because it can be changed into another prime (842583425927) 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, 421291712960 + 421291712961.

It is an arithmetic number, because the mean of its divisors is an integer number (421291712961).

Almost surely, 2^842583425921 is an apocalyptic number.

It is an amenable number.

842583425921 is a deficient number, since it is larger than the sum of its proper divisors (1).

842583425921 is an equidigital number, since it uses as much as digits as its factorization.

842583425921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 53.

The spelling of 842583425921 in words is "eight hundred forty-two billion, five hundred eighty-three million, four hundred twenty-five thousand, nine hundred twenty-one".