978006173 has 2 divisors, whose sum is σ = 978006174. Its totient is φ = 978006172.

The previous prime is 978006167. The next prime is 978006187. The reversal of 978006173 is 371600879.

978006173 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., 975750169 + 2256004 = 31237^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 978006173 - 2⁴ = 978006157 is a prime.

It is a super-2 number, since 2×978006173² = 1912992148852211858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 978006173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978006193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489003086 + 489003087.

It is an arithmetic number, because the mean of its divisors is an integer number (489003087).

Almost surely, 2^978006173 is an apocalyptic number.

It is an amenable number.

978006173 is a deficient number, since it is larger than the sum of its proper divisors (1).

978006173 is an equidigital number, since it uses as much as digits as its factorization.

978006173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 978006173 is about 31273.0902374549. The cubic root of 978006173 is about 992.6143102122.

The spelling of 978006173 in words is "nine hundred seventy-eight million, six thousand, one hundred seventy-three".