606600991 has 2 divisors, whose sum is σ = 606600992. Its totient is φ = 606600990.

The previous prime is 606600983. The next prime is 606601001. The reversal of 606600991 is 199006606.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 606600991 - 2³ = 606600983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 606600991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606600971) 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, 303300495 + 303300496.

It is an arithmetic number, because the mean of its divisors is an integer number (303300496).

Almost surely, 2^606600991 is an apocalyptic number.

606600991 is a deficient number, since it is larger than the sum of its proper divisors (1).

606600991 is an equidigital number, since it uses as much as digits as its factorization.

606600991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 606600991 is about 24629.2710204748. The cubic root of 606600991 is about 846.5144420322.

The spelling of 606600991 in words is "six hundred six million, six hundred thousand, nine hundred ninety-one".