173406881 has 2 divisors, whose sum is σ = 173406882. Its totient is φ = 173406880.

The previous prime is 173406859. The next prime is 173406929. The reversal of 173406881 is 188604371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130896481 + 42510400 = 11441^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 173406881 - 2¹⁰ = 173405857 is a prime.

It is a super-2 number, since 2×173406881² = 60139892756296322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (173406811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86703440 + 86703441.

It is an arithmetic number, because the mean of its divisors is an integer number (86703441).

Almost surely, 2^173406881 is an apocalyptic number.

It is an amenable number.

173406881 is a deficient number, since it is larger than the sum of its proper divisors (1).

173406881 is an equidigital number, since it uses as much as digits as its factorization.

173406881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 173406881 is about 13168.4046490074. The cubic root of 173406881 is about 557.6419565174.

The spelling of 173406881 in words is "one hundred seventy-three million, four hundred six thousand, eight hundred eighty-one".