245222609 has 2 divisors, whose sum is σ = 245222610. Its totient is φ = 245222608.

The previous prime is 245222597. The next prime is 245222611. The reversal of 245222609 is 906222542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179158225 + 66064384 = 13385^2 + 8128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245222609 is a prime.

Together with 245222611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245222629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122611304 + 122611305.

It is an arithmetic number, because the mean of its divisors is an integer number (122611305).

Almost surely, 2^245222609 is an apocalyptic number.

It is an amenable number.

245222609 is a deficient number, since it is larger than the sum of its proper divisors (1).

245222609 is an equidigital number, since it uses as much as digits as its factorization.

245222609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 245222609 is about 15659.5852116204. The cubic root of 245222609 is about 625.9219324097.

The spelling of 245222609 in words is "two hundred forty-five million, two hundred twenty-two thousand, six hundred nine".