978625 has 8 divisors (see below), whose sum is σ = 1221480. Its totient is φ = 782800.

The previous prime is 978619. The next prime is 978643. The reversal of 978625 is 526879.

It can be written as a sum of positive squares in 4 ways, for example, as 163216 + 815409 = 404^2 + 903^2 .

It is not a de Polignac number, because 978625 - 2³ = 978617 is a prime.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3790 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (152685).

2⁹⁷⁸⁶²⁵ is an apocalyptic number.

It is an amenable number.

978625 is a deficient number, since it is larger than the sum of its proper divisors (242855).

978625 is an equidigital number, since it uses as much as digits as its factorization.

978625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844 (or 7834 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 978625 is about 989.2547700163. The cubic root of 978625 is about 99.2823622806.

It can be divided in two parts, 9786 and 25, that multiplied together give a triangular number (244650 = T₆₉₉).

The spelling of 978625 in words is "nine hundred seventy-eight thousand, six hundred twenty-five".