96681721 has 2 divisors, whose sum is σ = 96681722. Its totient is φ = 96681720.

The previous prime is 96681691. The next prime is 96681727. The reversal of 96681721 is 12718669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 25110121 = 8460^2 + 5011^2 .

It is a cyclic number.

It is not a de Polignac number, because 96681721 - 2¹¹ = 96679673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (96681727) 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, 48340860 + 48340861.

It is an arithmetic number, because the mean of its divisors is an integer number (48340861).

Almost surely, 2^96681721 is an apocalyptic number.

It is an amenable number.

96681721 is a deficient number, since it is larger than the sum of its proper divisors (1).

96681721 is an equidigital number, since it uses as much as digits as its factorization.

96681721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 96681721 is about 9832.6863572474. The cubic root of 96681721 is about 458.9669967078.

The spelling of 96681721 in words is "ninety-six million, six hundred eighty-one thousand, seven hundred twenty-one".