173166401 has 4 divisors (see below), whose sum is σ = 177846612. Its totient is φ = 168486192.

The previous prime is 173166359. The next prime is 173166407. The reversal of 173166401 is 104661371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104661371 = 8243 ⋅12697.

It can be written as a sum of positive squares in 2 ways, for example, as 166281025 + 6885376 = 12895^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 173166401 - 2¹⁴ = 173150017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (173166407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340050 + ... + 2340123.

It is an arithmetic number, because the mean of its divisors is an integer number (44461653).

Almost surely, 2^173166401 is an apocalyptic number.

It is an amenable number.

173166401 is a deficient number, since it is larger than the sum of its proper divisors (4680211).

173166401 is an equidigital number, since it uses as much as digits as its factorization.

173166401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680210.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 173166401 is about 13159.2705344939. The cubic root of 173166401 is about 557.3840586852.

The spelling of 173166401 in words is "one hundred seventy-three million, one hundred sixty-six thousand, four hundred one".