245679617 has 4 divisors (see below), whose sum is σ = 248064960. Its totient is φ = 243294276.

The previous prime is 245679613. The next prime is 245679641. The reversal of 245679617 is 716976542.

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 245679617 - 2² = 245679613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245679611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192517 + ... + 1192722.

It is an arithmetic number, because the mean of its divisors is an integer number (62016240).

Almost surely, 2^245679617 is an apocalyptic number.

It is an amenable number.

245679617 is a deficient number, since it is larger than the sum of its proper divisors (2385343).

245679617 is a wasteful number, since it uses less digits than its factorization.

245679617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385342.

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

The square root of 245679617 is about 15674.1703767695. The cubic root of 245679617 is about 626.3105232986.

The spelling of 245679617 in words is "two hundred forty-five million, six hundred seventy-nine thousand, six hundred seventeen".