106968721 has 2 divisors, whose sum is σ = 106968722. Its totient is φ = 106968720.

The previous prime is 106968691. The next prime is 106968731. The reversal of 106968721 is 127869601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 2131600 = 10239^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 106968721 - 2⁹ = 106968209 is a prime.

It is a super-2 number, since 2×106968721² = 22884614544751682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (106968731) 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, 53484360 + 53484361.

It is an arithmetic number, because the mean of its divisors is an integer number (53484361).

Almost surely, 2^106968721 is an apocalyptic number.

It is an amenable number.

106968721 is a deficient number, since it is larger than the sum of its proper divisors (1).

106968721 is an equidigital number, since it uses as much as digits as its factorization.

106968721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 106968721 is about 10342.5683947461. The cubic root of 106968721 is about 474.6996749755.

The spelling of 106968721 in words is "one hundred six million, nine hundred sixty-eight thousand, seven hundred twenty-one".