978147 has 12 divisors (see below), whose sum is σ = 1421784. Its totient is φ = 648000.

The previous prime is 978113. The next prime is 978149. The reversal of 978147 is 741879.

It is not a de Polignac number, because 978147 - 2¹⁸ = 716003 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978147.

It is not an unprimeable number, because it can be changed into a prime (978149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2043 + ... + 2475.

It is an arithmetic number, because the mean of its divisors is an integer number (118482).

2⁹⁷⁸¹⁴⁷ is an apocalyptic number.

978147 is a deficient number, since it is larger than the sum of its proper divisors (443637).

978147 is a wasteful number, since it uses less digits than its factorization.

978147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 687 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 978147 is about 989.0131445031. The cubic root of 978147 is about 99.2661951420.

The spelling of 978147 in words is "nine hundred seventy-eight thousand, one hundred forty-seven".