10396721 has 2 divisors, whose sum is σ = 10396722. Its totient is φ = 10396720.

The previous prime is 10396709. The next prime is 10396753. The reversal of 10396721 is 12769301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 2217121 = 2860^2 + 1489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10396721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10396121) 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, 5198360 + 5198361.

It is an arithmetic number, because the mean of its divisors is an integer number (5198361).

Almost surely, 2^10396721 is an apocalyptic number.

It is an amenable number.

10396721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10396721 is an equidigital number, since it uses as much as digits as its factorization.

10396721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 10396721 is about 3224.3946718725. The cubic root of 10396721 is about 218.2556339620.

The spelling of 10396721 in words is "ten million, three hundred ninety-six thousand, seven hundred twenty-one".