222191689 has 2 divisors, whose sum is σ = 222191690. Its totient is φ = 222191688.

The previous prime is 222191653. The next prime is 222191693. The reversal of 222191689 is 986191222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145926400 + 76265289 = 12080^2 + 8733^2 .

It is a cyclic number.

It is not a de Polignac number, because 222191689 - 2¹¹ = 222189641 is a prime.

It is not a weakly prime, because it can be changed into another prime (222191609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111095844 + 111095845.

It is an arithmetic number, because the mean of its divisors is an integer number (111095845).

Almost surely, 2^222191689 is an apocalyptic number.

It is an amenable number.

222191689 is a deficient number, since it is larger than the sum of its proper divisors (1).

222191689 is an equidigital number, since it uses as much as digits as its factorization.

222191689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 222191689 is about 14906.0956994110. The cubic root of 222191689 is about 605.6791217333.

The spelling of 222191689 in words is "two hundred twenty-two million, one hundred ninety-one thousand, six hundred eighty-nine".