1000022197 has 2 divisors, whose sum is σ = 1000022198. Its totient is φ = 1000022196.

The previous prime is 1000022189. The next prime is 1000022213. The reversal of 1000022197 is 7912200001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989039601 + 10982596 = 31449^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000022197 - 2³ = 1000022189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000022897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500011098 + 500011099.

It is an arithmetic number, because the mean of its divisors is an integer number (500011099).

Almost surely, 2^1000022197 is an apocalyptic number.

It is an amenable number.

1000022197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000022197 is an equidigital number, since it uses as much as digits as its factorization.

1000022197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1000022197 is about 31623.1275651223. The cubic root of 1000022197 is about 1000.0073989453.

Adding to 1000022197 its reverse (7912200001), we get a palindrome (8912222198).

The spelling of 1000022197 in words is "one billion, twenty-two thousand, one hundred ninety-seven".