606695989 has 2 divisors, whose sum is σ = 606695990. Its totient is φ = 606695988.

The previous prime is 606695963. The next prime is 606696019. The reversal of 606695989 is 989596606.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467856900 + 138839089 = 21630^2 + 11783^2 .

It is a cyclic number.

It is not a de Polignac number, because 606695989 - 2⁷ = 606695861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606695489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303347994 + 303347995.

It is an arithmetic number, because the mean of its divisors is an integer number (303347995).

Almost surely, 2^606695989 is an apocalyptic number.

It is an amenable number.

606695989 is a deficient number, since it is larger than the sum of its proper divisors (1).

606695989 is an equidigital number, since it uses as much as digits as its factorization.

606695989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 58.

The square root of 606695989 is about 24631.1995038813. The cubic root of 606695989 is about 846.5586297726.

The spelling of 606695989 in words is "six hundred six million, six hundred ninety-five thousand, nine hundred eighty-nine".