97830197 has 2 divisors, whose sum is σ = 97830198. Its totient is φ = 97830196.

The previous prime is 97830181. The next prime is 97830269. The reversal of 97830197 is 79103879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66031876 + 31798321 = 8126^2 + 5639^2 .

It is an emirp because it is prime and its reverse (79103879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97830197 - 2⁴ = 97830181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97830157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48915098 + 48915099.

It is an arithmetic number, because the mean of its divisors is an integer number (48915099).

Almost surely, 2^97830197 is an apocalyptic number.

It is an amenable number.

97830197 is a deficient number, since it is larger than the sum of its proper divisors (1).

97830197 is an equidigital number, since it uses as much as digits as its factorization.

97830197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 97830197 is about 9890.9148717396. The cubic root of 97830197 is about 460.7771943411. Note that the first 3 decimals are identical.

The spelling of 97830197 in words is "ninety-seven million, eight hundred thirty thousand, one hundred ninety-seven".