1230173309 has 2 divisors, whose sum is σ = 1230173310. Its totient is φ = 1230173308.

The previous prime is 1230173207. The next prime is 1230173327. The reversal of 1230173309 is 9033710321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210344100 + 19829209 = 34790^2 + 4453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230173309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230173909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615086654 + 615086655.

It is an arithmetic number, because the mean of its divisors is an integer number (615086655).

Almost surely, 2^1230173309 is an apocalyptic number.

It is an amenable number.

1230173309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230173309 is an equidigital number, since it uses as much as digits as its factorization.

1230173309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 1230173309 is about 35073.8265520031. The cubic root of 1230173309 is about 1071.4915899331.

The spelling of 1230173309 in words is "one billion, two hundred thirty million, one hundred seventy-three thousand, three hundred nine".