677222209 has 2 divisors, whose sum is σ = 677222210. Its totient is φ = 677222208.

The previous prime is 677222197. The next prime is 677222243. The reversal of 677222209 is 902222776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597655809 + 79566400 = 24447^2 + 8920^2 .

It is a cyclic number.

It is not a de Polignac number, because 677222209 - 2²⁷ = 543004481 is a prime.

It is not a weakly prime, because it can be changed into another prime (677222309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338611104 + 338611105.

It is an arithmetic number, because the mean of its divisors is an integer number (338611105).

Almost surely, 2^677222209 is an apocalyptic number.

It is an amenable number.

677222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

677222209 is an equidigital number, since it uses as much as digits as its factorization.

677222209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 677222209 is about 26023.4934049985. The cubic root of 677222209 is about 878.1669008666.

The spelling of 677222209 in words is "six hundred seventy-seven million, two hundred twenty-two thousand, two hundred nine".