245705617 has 4 divisors (see below), whose sum is σ = 245828160. Its totient is φ = 245583076.

The previous prime is 245705611. The next prime is 245705633. The reversal of 245705617 is 716507542.

245705617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245705617 - 2⁷ = 245705489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245705611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58213 + ... + 62290.

It is an arithmetic number, because the mean of its divisors is an integer number (61457040).

Almost surely, 2^245705617 is an apocalyptic number.

It is an amenable number.

245705617 is a deficient number, since it is larger than the sum of its proper divisors (122543).

245705617 is a wasteful number, since it uses less digits than its factorization.

245705617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122542.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 245705617 is about 15674.9997448166. Note that the first 3 decimals coincide. The cubic root of 245705617 is about 626.3326164340.

The spelling of 245705617 in words is "two hundred forty-five million, seven hundred five thousand, six hundred seventeen".