9678751 has 2 divisors, whose sum is σ = 9678752. Its totient is φ = 9678750.

The previous prime is 9678749. The next prime is 9678761. The reversal of 9678751 is 1578769.

It is a weak prime.

It is an emirp because it is prime and its reverse (1578769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9678751 - 2¹ = 9678749 is a prime.

Together with 9678749, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 9⁵ + 6⁸ + 7 + 8⁷ + 7⁸ + 5⁷ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 9678698 and 9678707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9678761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4839375 + 4839376.

It is an arithmetic number, because the mean of its divisors is an integer number (4839376).

Almost surely, 2^9678751 is an apocalyptic number.

9678751 is a deficient number, since it is larger than the sum of its proper divisors (1).

9678751 is an equidigital number, since it uses as much as digits as its factorization.

9678751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 9678751 is about 3111.0691088435. The cubic root of 9678751 is about 213.1112807249. Note that the first 3 decimals are identical.

The spelling of 9678751 in words is "nine million, six hundred seventy-eight thousand, seven hundred fifty-one".