978689351 has 2 divisors, whose sum is σ = 978689352. Its totient is φ = 978689350.

The previous prime is 978689317. The next prime is 978689401. The reversal of 978689351 is 153986879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978689351 - 2⁶ = 978689287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978682351) 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, 489344675 + 489344676.

It is an arithmetic number, because the mean of its divisors is an integer number (489344676).

Almost surely, 2^978689351 is an apocalyptic number.

978689351 is a deficient number, since it is larger than the sum of its proper divisors (1).

978689351 is an equidigital number, since it uses as much as digits as its factorization.

978689351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 978689351 is about 31284.0111079126. The cubic root of 978689351 is about 992.8453838796.

The spelling of 978689351 in words is "nine hundred seventy-eight million, six hundred eighty-nine thousand, three hundred fifty-one".