173666041 has 2 divisors, whose sum is σ = 173666042. Its totient is φ = 173666040.

The previous prime is 173666039. The next prime is 173666047. The reversal of 173666041 is 140666371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149695225 + 23970816 = 12235^2 + 4896^2 .

It is an emirp because it is prime and its reverse (140666371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173666041 - 2¹ = 173666039 is a prime.

It is a super-2 number, since 2×173666041² = 60319787593227362, which contains 22 as substring.

Together with 173666039, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 173665988 and 173666006.

It is not a weakly prime, because it can be changed into another prime (173666047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86833020 + 86833021.

It is an arithmetic number, because the mean of its divisors is an integer number (86833021).

Almost surely, 2^173666041 is an apocalyptic number.

It is an amenable number.

173666041 is a deficient number, since it is larger than the sum of its proper divisors (1).

173666041 is an equidigital number, since it uses as much as digits as its factorization.

173666041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 173666041 is about 13178.2411952430. The cubic root of 173666041 is about 557.9196205353.

The spelling of 173666041 in words is "one hundred seventy-three million, six hundred sixty-six thousand, forty-one".