978602173 has 2 divisors, whose sum is σ = 978602174. Its totient is φ = 978602172.

The previous prime is 978602167. The next prime is 978602237. The reversal of 978602173 is 371206879.

It is a happy number.

978602173 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., 972317124 + 6285049 = 31182^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 978602173 - 2²¹ = 976505021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978600173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489301086 + 489301087.

It is an arithmetic number, because the mean of its divisors is an integer number (489301087).

Almost surely, 2^978602173 is an apocalyptic number.

It is an amenable number.

978602173 is a deficient number, since it is larger than the sum of its proper divisors (1).

978602173 is an equidigital number, since it uses as much as digits as its factorization.

978602173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 978602173 is about 31282.6177453230. The cubic root of 978602173 is about 992.8159033487.

The spelling of 978602173 in words is "nine hundred seventy-eight million, six hundred two thousand, one hundred seventy-three".