978117683 has 2 divisors, whose sum is σ = 978117684. Its totient is φ = 978117682.

The previous prime is 978117671. The next prime is 978117727. The reversal of 978117683 is 386711879.

978117683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978117683 - 2¹⁶ = 978052147 is a prime.

It is not a weakly prime, because it can be changed into another prime (978117653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489058841 + 489058842.

It is an arithmetic number, because the mean of its divisors is an integer number (489058842).

Almost surely, 2^978117683 is an apocalyptic number.

978117683 is a deficient number, since it is larger than the sum of its proper divisors (1).

978117683 is an equidigital number, since it uses as much as digits as its factorization.

978117683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 978117683 is about 31274.8730293186. The cubic root of 978117683 is about 992.6520339739.

The spelling of 978117683 in words is "nine hundred seventy-eight million, one hundred seventeen thousand, six hundred eighty-three".