842848991 has 2 divisors, whose sum is σ = 842848992. Its totient is φ = 842848990.

The previous prime is 842848943. The next prime is 842848997. The reversal of 842848991 is 199848248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842848991 - 2¹⁴ = 842832607 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842848997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421424495 + 421424496.

It is an arithmetic number, because the mean of its divisors is an integer number (421424496).

Almost surely, 2^842848991 is an apocalyptic number.

842848991 is a deficient number, since it is larger than the sum of its proper divisors (1).

842848991 is an equidigital number, since it uses as much as digits as its factorization.

842848991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1327104, while the sum is 53.

The square root of 842848991 is about 29031.8616523295. The cubic root of 842848991 is about 944.6043120065.

The spelling of 842848991 in words is "eight hundred forty-two million, eight hundred forty-eight thousand, nine hundred ninety-one".