96816721 has 2 divisors, whose sum is σ = 96816722. Its totient is φ = 96816720.

The previous prime is 96816691. The next prime is 96816739. The reversal of 96816721 is 12761869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 44036496 = 7265^2 + 6636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-96816721 is a prime.

It is not a weakly prime, because it can be changed into another prime (96814721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48408360 + 48408361.

It is an arithmetic number, because the mean of its divisors is an integer number (48408361).

Almost surely, 2^96816721 is an apocalyptic number.

It is an amenable number.

96816721 is a deficient number, since it is larger than the sum of its proper divisors (1).

96816721 is an equidigital number, since it uses as much as digits as its factorization.

96816721 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 96816721 is about 9839.5488209572. The cubic root of 96816721 is about 459.1805211364.

It can be divided in two parts, 968 and 16721, that added together give a square (17689 = 133²).

The spelling of 96816721 in words is "ninety-six million, eight hundred sixteen thousand, seven hundred twenty-one".