10197806917 has 2 divisors, whose sum is σ = 10197806918. Its totient is φ = 10197806916.

The previous prime is 10197806897. The next prime is 10197806921. The reversal of 10197806917 is 71960879101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9427244836 + 770562081 = 97094^2 + 27759^2 .

It is a cyclic number.

It is not a de Polignac number, because 10197806917 - 2⁷ = 10197806789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10197806617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5098903458 + 5098903459.

It is an arithmetic number, because the mean of its divisors is an integer number (5098903459).

Almost surely, 2^10197806917 is an apocalyptic number.

It is an amenable number.

10197806917 is a deficient number, since it is larger than the sum of its proper divisors (1).

10197806917 is an equidigital number, since it uses as much as digits as its factorization.

10197806917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 49.

The spelling of 10197806917 in words is "ten billion, one hundred ninety-seven million, eight hundred six thousand, nine hundred seventeen".