1600000009 has 2 divisors, whose sum is σ = 1600000010. Its totient is φ = 1600000008.

The previous prime is 1599999983. The next prime is 1600000019. The reversal of 1600000009 is 9000000061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1600000000 + 9 = 40000^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600000009 - 2²¹ = 1597902857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1599999938 and 1600000001.

It is not a weakly prime, because it can be changed into another prime (1600000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800000004 + 800000005.

It is an arithmetic number, because the mean of its divisors is an integer number (800000005).

Almost surely, 2^1600000009 is an apocalyptic number.

It is an amenable number.

1600000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600000009 is an equidigital number, since it uses as much as digits as its factorization.

1600000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1600000009 is about 40000.0001125000. Note that the first 3 decimals coincide. The cubic root of 1600000009 is about 1169.6070974782.

The spelling of 1600000009 in words is "one billion, six hundred million, nine", and thus it is an aban number.