978926017 has 2 divisors, whose sum is σ = 978926018. Its totient is φ = 978926016.

The previous prime is 978925991. The next prime is 978926021. The reversal of 978926017 is 710629879.

It is a happy number.

978926017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705486721 + 273439296 = 26561^2 + 16536^2 .

It is a cyclic number.

It is not a de Polignac number, because 978926017 - 2¹¹ = 978923969 is a prime.

It is a super-2 number, since 2×978926017² = 1916592293518968578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (978926027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489463008 + 489463009.

It is an arithmetic number, because the mean of its divisors is an integer number (489463009).

Almost surely, 2^978926017 is an apocalyptic number.

It is an amenable number.

978926017 is a deficient number, since it is larger than the sum of its proper divisors (1).

978926017 is an equidigital number, since it uses as much as digits as its factorization.

978926017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 978926017 is about 31287.7934185203. The cubic root of 978926017 is about 992.9254071637.

The spelling of 978926017 in words is "nine hundred seventy-eight million, nine hundred twenty-six thousand, seventeen".