978697 has 2 divisors, whose sum is σ = 978698. Its totient is φ = 978696.

The previous prime is 978689. The next prime is 978713. The reversal of 978697 is 796879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 576 = 989^2 + 24^2 .

It is a cyclic number.

It is not a de Polignac number, because 978697 - 2³ = 978689 is a prime.

It is not a weakly prime, because it can be changed into another prime (978617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489348 + 489349.

It is an arithmetic number, because the mean of its divisors is an integer number (489349).

2⁹⁷⁸⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

978697 is a deficient number, since it is larger than the sum of its proper divisors (1).

978697 is an equidigital number, since it uses as much as digits as its factorization.

978697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 978697 is about 989.2911603770. The cubic root of 978697 is about 99.2847970419.

The spelling of 978697 in words is "nine hundred seventy-eight thousand, six hundred ninety-seven".