245165617 has 2 divisors, whose sum is σ = 245165618. Its totient is φ = 245165616.

The previous prime is 245165597. The next prime is 245165621. The reversal of 245165617 is 716561542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242238096 + 2927521 = 15564^2 + 1711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245165617 is a prime.

It is not a weakly prime, because it can be changed into another prime (245165017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122582808 + 122582809.

It is an arithmetic number, because the mean of its divisors is an integer number (122582809).

Almost surely, 2^245165617 is an apocalyptic number.

It is an amenable number.

245165617 is a deficient number, since it is larger than the sum of its proper divisors (1).

245165617 is an equidigital number, since it uses as much as digits as its factorization.

245165617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 245165617 is about 15657.7653897355. The cubic root of 245165617 is about 625.8734386393.

The spelling of 245165617 in words is "two hundred forty-five million, one hundred sixty-five thousand, six hundred seventeen".