978654559 has 2 divisors, whose sum is σ = 978654560. Its totient is φ = 978654558.

The previous prime is 978654541. The next prime is 978654613. The reversal of 978654559 is 955456879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978654559 - 2¹¹ = 978652511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978651559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489327279 + 489327280.

It is an arithmetic number, because the mean of its divisors is an integer number (489327280).

Almost surely, 2^978654559 is an apocalyptic number.

978654559 is a deficient number, since it is larger than the sum of its proper divisors (1).

978654559 is an equidigital number, since it uses as much as digits as its factorization.

978654559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608000, while the sum is 58.

The square root of 978654559 is about 31283.4550361689. The cubic root of 978654559 is about 992.8336186598.

The spelling of 978654559 in words is "nine hundred seventy-eight million, six hundred fifty-four thousand, five hundred fifty-nine".