2291197 has 2 divisors, whose sum is σ = 2291198.
Its totient is φ = 2291196.
The previous prime is 2291189. The next prime is 2291213. The reversal of 2291197 is 7911922.
It can be divided in two parts, 22 and 91197, that added together give a palindrome (91219).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1279161 + 1012036 = 1131^2 + 1006^2
It is a cyclic number.
It is not a de Polignac number, because 2291197 - 23 = 2291189 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2291167) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145598 + 1145599.
It is an arithmetic number, because the mean of its divisors is an integer number (1145599).
22291197 is an apocalyptic number.
It is an amenable number.
2291197 is a deficient number, since it is larger than the sum of its proper divisors (1).
2291197 is an equidigital number, since it uses as much as digits as its factorization.
2291197 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2268, while the sum is 31.
The square root of 2291197 is about 1513.6700433053.
The cubic root of 2291197 is about 131.8319908713.
The spelling of 2291197 in words is "two million, two hundred ninety-one thousand, one hundred ninety-seven".