921197 has 2 divisors, whose sum is σ = 921198. Its totient is φ = 921196.

The previous prime is 921191. The next prime is 921199. The reversal of 921197 is 791129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 48841 = 934^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 921197 - 2⁶ = 921133 is a prime.

Together with 921199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921197.

It is not a weakly prime, because it can be changed into another prime (921191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460598 + 460599.

It is an arithmetic number, because the mean of its divisors is an integer number (460599).

2⁹²¹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

921197 is a deficient number, since it is larger than the sum of its proper divisors (1).

921197 is an equidigital number, since it uses as much as digits as its factorization.

921197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 29.

The square root of 921197 is about 959.7900812157. The cubic root of 921197 is about 97.3010450960.

The spelling of 921197 in words is "nine hundred twenty-one thousand, one hundred ninety-seven".