8921197 has 2 divisors, whose sum is σ = 8921198. Its totient is φ = 8921196.

The previous prime is 8921179. The next prime is 8921207. The reversal of 8921197 is 7911298.

8921197 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (8921179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5103081 + 3818116 = 2259^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 8921197 - 2⁷ = 8921069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8991197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460598 + 4460599.

It is an arithmetic number, because the mean of its divisors is an integer number (4460599).

Almost surely, 2^8921197 is an apocalyptic number.

It is an amenable number.

8921197 is a deficient number, since it is larger than the sum of its proper divisors (1).

8921197 is an equidigital number, since it uses as much as digits as its factorization.

8921197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 37.

The square root of 8921197 is about 2986.8372905132. The cubic root of 8921197 is about 207.3995023092.

The spelling of 8921197 in words is "eight million, nine hundred twenty-one thousand, one hundred ninety-seven".