245217073 has 2 divisors, whose sum is σ = 245217074. Its totient is φ = 245217072.

The previous prime is 245217041. The next prime is 245217079. The reversal of 245217073 is 370712542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235407649 + 9809424 = 15343^2 + 3132^2 .

It is a cyclic number.

It is not a de Polignac number, because 245217073 - 2⁵ = 245217041 is a prime.

It is not a weakly prime, because it can be changed into another prime (245217079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122608536 + 122608537.

It is an arithmetic number, because the mean of its divisors is an integer number (122608537).

Almost surely, 2^245217073 is an apocalyptic number.

It is an amenable number.

245217073 is a deficient number, since it is larger than the sum of its proper divisors (1).

245217073 is an equidigital number, since it uses as much as digits as its factorization.

245217073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 245217073 is about 15659.4084498745. The cubic root of 245217073 is about 625.9172222269.

The spelling of 245217073 in words is "two hundred forty-five million, two hundred seventeen thousand, seventy-three".