978863 has 2 divisors, whose sum is σ = 978864. Its totient is φ = 978862.

The previous prime is 978853. The next prime is 978871. The reversal of 978863 is 368879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978863 - 2⁶ = 978799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 978863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489431 + 489432.

It is an arithmetic number, because the mean of its divisors is an integer number (489432).

2⁹⁷⁸⁸⁶³ is an apocalyptic number.

978863 is a deficient number, since it is larger than the sum of its proper divisors (1).

978863 is an equidigital number, since it uses as much as digits as its factorization.

978863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 978863 is about 989.3750552748. The cubic root of 978863 is about 99.2904100643.

The spelling of 978863 in words is "nine hundred seventy-eight thousand, eight hundred sixty-three".