173561603 has 2 divisors, whose sum is σ = 173561604. Its totient is φ = 173561602.

The previous prime is 173561587. The next prime is 173561623. The reversal of 173561603 is 306165371.

It is a weak prime.

It is an emirp because it is prime and its reverse (306165371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173561603 - 2⁴ = 173561587 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173561603.

It is not a weakly prime, because it can be changed into another prime (173561623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86780801 + 86780802.

It is an arithmetic number, because the mean of its divisors is an integer number (86780802).

Almost surely, 2^173561603 is an apocalyptic number.

173561603 is a deficient number, since it is larger than the sum of its proper divisors (1).

173561603 is an equidigital number, since it uses as much as digits as its factorization.

173561603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 173561603 is about 13174.2780826883. The cubic root of 173561603 is about 557.8077589164.

The spelling of 173561603 in words is "one hundred seventy-three million, five hundred sixty-one thousand, six hundred three".