245259689 has 2 divisors, whose sum is σ = 245259690. Its totient is φ = 245259688.

The previous prime is 245259661. The next prime is 245259719. The reversal of 245259689 is 986952542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213393664 + 31866025 = 14608^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 245259689 - 2²⁰ = 244211113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245259389) 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, 122629844 + 122629845.

It is an arithmetic number, because the mean of its divisors is an integer number (122629845).

Almost surely, 2^245259689 is an apocalyptic number.

It is an amenable number.

245259689 is a deficient number, since it is larger than the sum of its proper divisors (1).

245259689 is an equidigital number, since it uses as much as digits as its factorization.

245259689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 245259689 is about 15660.7691062732. The cubic root of 245259689 is about 625.9534792773.

The spelling of 245259689 in words is "two hundred forty-five million, two hundred fifty-nine thousand, six hundred eighty-nine".