606021989 has 2 divisors, whose sum is σ = 606021990. Its totient is φ = 606021988.

The previous prime is 606021973. The next prime is 606022003. The reversal of 606021989 is 989120606.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541492900 + 64529089 = 23270^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 606021989 - 2⁴ = 606021973 is a prime.

It is a super-2 number, since 2×606021989² = 734525302303032242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606021959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303010994 + 303010995.

It is an arithmetic number, because the mean of its divisors is an integer number (303010995).

Almost surely, 2^606021989 is an apocalyptic number.

It is an amenable number.

606021989 is a deficient number, since it is larger than the sum of its proper divisors (1).

606021989 is an equidigital number, since it uses as much as digits as its factorization.

606021989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 606021989 is about 24617.5138671638. The cubic root of 606021989 is about 846.2450229855.

The spelling of 606021989 in words is "six hundred six million, twenty-one thousand, nine hundred eighty-nine".