6916121 has 2 divisors, whose sum is σ = 6916122. Its totient is φ = 6916120.

The previous prime is 6916109. The next prime is 6916153. The reversal of 6916121 is 1216196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5784025 + 1132096 = 2405^2 + 1064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6916121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6910121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3458060 + 3458061.

It is an arithmetic number, because the mean of its divisors is an integer number (3458061).

Almost surely, 2^6916121 is an apocalyptic number.

It is an amenable number.

6916121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6916121 is an equidigital number, since it uses as much as digits as its factorization.

6916121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 6916121 is about 2629.8518969706. The cubic root of 6916121 is about 190.5259756580.

The spelling of 6916121 in words is "six million, nine hundred sixteen thousand, one hundred twenty-one".