10993721 has 2 divisors, whose sum is σ = 10993722. Its totient is φ = 10993720.

The previous prime is 10993709. The next prime is 10993729. The reversal of 10993721 is 12739901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9703225 + 1290496 = 3115^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 10993721 - 2¹⁸ = 10731577 is a prime.

It is not a weakly prime, because it can be changed into another prime (10993729) 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, 5496860 + 5496861.

It is an arithmetic number, because the mean of its divisors is an integer number (5496861).

Almost surely, 2^10993721 is an apocalyptic number.

It is an amenable number.

10993721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10993721 is an equidigital number, since it uses as much as digits as its factorization.

10993721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 10993721 is about 3315.6780603671. The cubic root of 10993721 is about 222.3556847270.

The spelling of 10993721 in words is "ten million, nine hundred ninety-three thousand, seven hundred twenty-one".