245165689 has 2 divisors, whose sum is σ = 245165690. Its totient is φ = 245165688.

The previous prime is 245165621. The next prime is 245165729. The reversal of 245165689 is 986561542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179426025 + 65739664 = 13395^2 + 8108^2 .

It is a cyclic number.

It is not a de Polignac number, because 245165689 - 2¹⁹ = 244641401 is a prime.

It is a super-3 number, since 3×245165689³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (245163689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122582844 + 122582845.

It is an arithmetic number, because the mean of its divisors is an integer number (122582845).

Almost surely, 2^245165689 is an apocalyptic number.

It is an amenable number.

245165689 is a deficient number, since it is larger than the sum of its proper divisors (1).

245165689 is an equidigital number, since it uses as much as digits as its factorization.

245165689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The square root of 245165689 is about 15657.7676889140. The cubic root of 245165689 is about 625.8734999079.

The spelling of 245165689 in words is "two hundred forty-five million, one hundred sixty-five thousand, six hundred eighty-nine".