9681929 has 2 divisors, whose sum is σ = 9681930. Its totient is φ = 9681928.

The previous prime is 9681913. The next prime is 9681937. The reversal of 9681929 is 9291869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7991929 + 1690000 = 2827^2 + 1300^2 .

It is an emirp because it is prime and its reverse (9291869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9681929 - 2⁴ = 9681913 is a prime.

It is a super-2 number, since 2×9681929² = 187479498322082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9681929.

It is not a weakly prime, because it can be changed into another prime (9681989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840964 + 4840965.

It is an arithmetic number, because the mean of its divisors is an integer number (4840965).

Almost surely, 2^9681929 is an apocalyptic number.

It is an amenable number.

9681929 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681929 is an equidigital number, since it uses as much as digits as its factorization.

9681929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 9681929 is about 3111.5798238194. The cubic root of 9681929 is about 213.1346030709.

The spelling of 9681929 in words is "nine million, six hundred eighty-one thousand, nine hundred twenty-nine".