245109617 has 2 divisors, whose sum is σ = 245109618. Its totient is φ = 245109616.

The previous prime is 245109611. The next prime is 245109629. The reversal of 245109617 is 716901542.

245109617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244328161 + 781456 = 15631^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 245109617 - 2¹⁰ = 245108593 is a prime.

It is not a weakly prime, because it can be changed into another prime (245109611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122554808 + 122554809.

It is an arithmetic number, because the mean of its divisors is an integer number (122554809).

Almost surely, 2^245109617 is an apocalyptic number.

It is an amenable number.

245109617 is a deficient number, since it is larger than the sum of its proper divisors (1).

245109617 is an equidigital number, since it uses as much as digits as its factorization.

245109617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 245109617 is about 15655.9770375406. The cubic root of 245109617 is about 625.8257816283.

The spelling of 245109617 in words is "two hundred forty-five million, one hundred nine thousand, six hundred seventeen".