245297497 has 2 divisors, whose sum is σ = 245297498. Its totient is φ = 245297496.

The previous prime is 245297477. The next prime is 245297527. The reversal of 245297497 is 794792542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170145936 + 75151561 = 13044^2 + 8669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245297497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245297497.

It is not a weakly prime, because it can be changed into another prime (245297477) 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, 122648748 + 122648749.

It is an arithmetic number, because the mean of its divisors is an integer number (122648749).

Almost surely, 2^245297497 is an apocalyptic number.

It is an amenable number.

245297497 is a deficient number, since it is larger than the sum of its proper divisors (1).

245297497 is an equidigital number, since it uses as much as digits as its factorization.

245297497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 245297497 is about 15661.9761524528. The cubic root of 245297497 is about 625.9856422379.

The spelling of 245297497 in words is "two hundred forty-five million, two hundred ninety-seven thousand, four hundred ninety-seven".