222797909 has 2 divisors, whose sum is σ = 222797910. Its totient is φ = 222797908.

The previous prime is 222797893. The next prime is 222797947. The reversal of 222797909 is 909797222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210337009 + 12460900 = 14503^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 222797909 - 2⁴ = 222797893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222797959) 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, 111398954 + 111398955.

It is an arithmetic number, because the mean of its divisors is an integer number (111398955).

Almost surely, 2^222797909 is an apocalyptic number.

It is an amenable number.

222797909 is a deficient number, since it is larger than the sum of its proper divisors (1).

222797909 is an equidigital number, since it uses as much as digits as its factorization.

222797909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 222797909 is about 14926.4164821969. The cubic root of 222797909 is about 606.2294594096.

The spelling of 222797909 in words is "two hundred twenty-two million, seven hundred ninety-seven thousand, nine hundred nine".