978041863 has 2 divisors, whose sum is σ = 978041864. Its totient is φ = 978041862.

The previous prime is 978041821. The next prime is 978041917. The reversal of 978041863 is 368140879.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978041863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978041963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489020931 + 489020932.

It is an arithmetic number, because the mean of its divisors is an integer number (489020932).

Almost surely, 2^978041863 is an apocalyptic number.

978041863 is a deficient number, since it is larger than the sum of its proper divisors (1).

978041863 is an equidigital number, since it uses as much as digits as its factorization.

978041863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 978041863 is about 31273.6608506264. The cubic root of 978041863 is about 992.6263844284.

The spelling of 978041863 in words is "nine hundred seventy-eight million, forty-one thousand, eight hundred sixty-three".