978957 has 24 divisors (see below), whose sum is σ = 1659840. Its totient is φ = 544320.

The previous prime is 978947. The next prime is 978973. The reversal of 978957 is 759879.

978957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 978957 - 2¹¹ = 976909 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978957.

It is not an unprimeable number, because it can be changed into a prime (978907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2394 + ... + 2772.

It is an arithmetic number, because the mean of its divisors is an integer number (69160).

2⁹⁷⁸⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

978957 is a deficient number, since it is larger than the sum of its proper divisors (680883).

978957 is a wasteful number, since it uses less digits than its factorization.

978957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 978957 is about 989.4225588696. The cubic root of 978957 is about 99.2935882413.

The spelling of 978957 in words is "nine hundred seventy-eight thousand, nine hundred fifty-seven".