913722197 has 2 divisors, whose sum is σ = 913722198. Its totient is φ = 913722196.

The previous prime is 913722193. The next prime is 913722211. The reversal of 913722197 is 791227319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672572356 + 241149841 = 25934^2 + 15529^2 .

It is an emirp because it is prime and its reverse (791227319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 913722197 - 2² = 913722193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913722191) 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, 456861098 + 456861099.

It is an arithmetic number, because the mean of its divisors is an integer number (456861099).

Almost surely, 2^913722197 is an apocalyptic number.

It is an amenable number.

913722197 is a deficient number, since it is larger than the sum of its proper divisors (1).

913722197 is an equidigital number, since it uses as much as digits as its factorization.

913722197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 41.

The square root of 913722197 is about 30227.8381132360. The cubic root of 913722197 is about 970.3715574481.

The spelling of 913722197 in words is "nine hundred thirteen million, seven hundred twenty-two thousand, one hundred ninety-seven".