7121673217 has 2 divisors, whose sum is σ = 7121673218. Its totient is φ = 7121673216.

The previous prime is 7121673203. The next prime is 7121673263. The reversal of 7121673217 is 7123761217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4494495681 + 2627177536 = 67041^2 + 51256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7121673217 is a prime.

It is not a weakly prime, because it can be changed into another prime (7121670217) 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, 3560836608 + 3560836609.

It is an arithmetic number, because the mean of its divisors is an integer number (3560836609).

Almost surely, 2^7121673217 is an apocalyptic number.

It is an amenable number.

7121673217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7121673217 is an equidigital number, since it uses as much as digits as its factorization.

7121673217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 37.

The square root of 7121673217 is about 84390.0066180825. The cubic root of 7121673217 is about 1923.9510306367.

The spelling of 7121673217 in words is "seven billion, one hundred twenty-one million, six hundred seventy-three thousand, two hundred seventeen".