245617697 has 4 divisors (see below), whose sum is σ = 264511380. Its totient is φ = 226724016.

The previous prime is 245617679. The next prime is 245617699. The reversal of 245617697 is 796716542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154529761 + 91087936 = 12431^2 + 9544^2 .

It is a cyclic number.

It is not a de Polignac number, because 245617697 - 2¹⁰ = 245616673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245617699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9446822 + ... + 9446847.

It is an arithmetic number, because the mean of its divisors is an integer number (66127845).

Almost surely, 2^245617697 is an apocalyptic number.

It is an amenable number.

245617697 is a deficient number, since it is larger than the sum of its proper divisors (18893683).

245617697 is a wasteful number, since it uses less digits than its factorization.

245617697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18893682.

The product of its digits is 635040, while the sum is 47.

The square root of 245617697 is about 15672.1950281382. The cubic root of 245617697 is about 626.2579013695.

The spelling of 245617697 in words is "two hundred forty-five million, six hundred seventeen thousand, six hundred ninety-seven".