97197917 has 2 divisors, whose sum is σ = 97197918. Its totient is φ = 97197916.

The previous prime is 97197913. The next prime is 97197929. The reversal of 97197917 is 71979179.

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., 65060356 + 32137561 = 8066^2 + 5669^2 .

It is a cyclic number.

It is not a de Polignac number, because 97197917 - 2² = 97197913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97197913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48598958 + 48598959.

It is an arithmetic number, because the mean of its divisors is an integer number (48598959).

Almost surely, 2^97197917 is an apocalyptic number.

It is an amenable number.

97197917 is a deficient number, since it is larger than the sum of its proper divisors (1).

97197917 is an equidigital number, since it uses as much as digits as its factorization.

97197917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250047, while the sum is 50.

The square root of 97197917 is about 9858.9003950745. The cubic root of 97197917 is about 459.7823750041.

The spelling of 97197917 in words is "ninety-seven million, one hundred ninety-seven thousand, nine hundred seventeen".