245497117 has 2 divisors, whose sum is σ = 245497118. Its totient is φ = 245497116.

The previous prime is 245497097. The next prime is 245497127. The reversal of 245497117 is 711794542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205377561 + 40119556 = 14331^2 + 6334^2 .

It is a cyclic number.

It is not a de Polignac number, because 245497117 - 2⁷ = 245496989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245497117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245497127) 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, 122748558 + 122748559.

It is an arithmetic number, because the mean of its divisors is an integer number (122748559).

Almost surely, 2^245497117 is an apocalyptic number.

It is an amenable number.

245497117 is a deficient number, since it is larger than the sum of its proper divisors (1).

245497117 is an equidigital number, since it uses as much as digits as its factorization.

245497117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 245497117 is about 15668.3476154954. The cubic root of 245497117 is about 626.1554025956.

The spelling of 245497117 in words is "two hundred forty-five million, four hundred ninety-seven thousand, one hundred seventeen".