173407009 has 2 divisors, whose sum is σ = 173407010. Its totient is φ = 173407008.

The previous prime is 173407007. The next prime is 173407093. The reversal of 173407009 is 900704371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100560784 + 72846225 = 10028^2 + 8535^2 .

It is a cyclic number.

It is not a de Polignac number, because 173407009 - 2¹ = 173407007 is a prime.

Together with 173407007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (173407007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86703504 + 86703505.

It is an arithmetic number, because the mean of its divisors is an integer number (86703505).

Almost surely, 2^173407009 is an apocalyptic number.

It is an amenable number.

173407009 is a deficient number, since it is larger than the sum of its proper divisors (1).

173407009 is an equidigital number, since it uses as much as digits as its factorization.

173407009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 173407009 is about 13168.4095091245. The cubic root of 173407009 is about 557.6420937249.

The spelling of 173407009 in words is "one hundred seventy-three million, four hundred seven thousand, nine".