606822991 has 2 divisors, whose sum is σ = 606822992. Its totient is φ = 606822990.

The previous prime is 606822967. The next prime is 606823031. The reversal of 606822991 is 199228606.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 606822991 - 2⁷ = 606822863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606822901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303411495 + 303411496.

It is an arithmetic number, because the mean of its divisors is an integer number (303411496).

Almost surely, 2^606822991 is an apocalyptic number.

606822991 is a deficient number, since it is larger than the sum of its proper divisors (1).

606822991 is an equidigital number, since it uses as much as digits as its factorization.

606822991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 606822991 is about 24633.7774407418. Note that the first 3 decimals coincide. The cubic root of 606822991 is about 846.6176967737.

The spelling of 606822991 in words is "six hundred six million, eight hundred twenty-two thousand, nine hundred ninety-one".