1606426009 has 2 divisors, whose sum is σ = 1606426010. Its totient is φ = 1606426008.

The previous prime is 1606425991. The next prime is 1606426037. The reversal of 1606426009 is 9006246061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089000000 + 517426009 = 33000^2 + 22747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606426009 - 2⁹ = 1606425497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606426309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803213004 + 803213005.

It is an arithmetic number, because the mean of its divisors is an integer number (803213005).

Almost surely, 2^1606426009 is an apocalyptic number.

It is an amenable number.

1606426009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606426009 is an equidigital number, since it uses as much as digits as its factorization.

1606426009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1606426009 is about 40080.2446225070. The cubic root of 1606426009 is about 1171.1708174057.

The spelling of 1606426009 in words is "one billion, six hundred six million, four hundred twenty-six thousand, nine".