606143809 has 2 divisors, whose sum is σ = 606143810. Its totient is φ = 606143808.

The previous prime is 606143807. The next prime is 606143821. The reversal of 606143809 is 908341606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524639025 + 81504784 = 22905^2 + 9028^2 .

It is a cyclic number.

It is not a de Polignac number, because 606143809 - 2¹ = 606143807 is a prime.

Together with 606143807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (606143801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303071904 + 303071905.

It is an arithmetic number, because the mean of its divisors is an integer number (303071905).

Almost surely, 2^606143809 is an apocalyptic number.

It is an amenable number.

606143809 is a deficient number, since it is larger than the sum of its proper divisors (1).

606143809 is an equidigital number, since it uses as much as digits as its factorization.

606143809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 606143809 is about 24619.9879975600. The cubic root of 606143809 is about 846.3017220623.

The spelling of 606143809 in words is "six hundred six million, one hundred forty-three thousand, eight hundred nine".