173245661 has 2 divisors, whose sum is σ = 173245662. Its totient is φ = 173245660.

The previous prime is 173245627. The next prime is 173245747. The reversal of 173245661 is 166542371.

173245661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148693636 + 24552025 = 12194^2 + 4955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173245661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173245601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86622830 + 86622831.

It is an arithmetic number, because the mean of its divisors is an integer number (86622831).

Almost surely, 2^173245661 is an apocalyptic number.

It is an amenable number.

173245661 is a deficient number, since it is larger than the sum of its proper divisors (1).

173245661 is an equidigital number, since it uses as much as digits as its factorization.

173245661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 173245661 is about 13162.2817550758. The cubic root of 173245661 is about 557.4690858068.

The spelling of 173245661 in words is "one hundred seventy-three million, two hundred forty-five thousand, six hundred sixty-one".